Build your own Aperture Science Portal Gun

 by ThePropNerds
Contest WinnerFeatured
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Five months ago, two college students got it into their heads to begin building a costume prop. Not just any costume prop, mind you – a costume prop to rule all other costume props and, in fact, the WORLD! Not really, but we did want to participate in the GenCon Indy 2011 costume contest and didn’t have any ideas for what to do!

Portal came to mind. Valve is a long-time favorite when it comes to awesome games for us, and so it then became a question of which Valve game to work from. Zoey from Left 4 Dead? Gordon Freeman of the fabled Half Life series? Or perhaps… could it be? Yes! Chell was our woman, and our own epic tale in the quest of a Chell costume began.

Of course, the first thing that any Chell costume needs is an Aperture Science Handheld Portal Device (or ASHPD), and in looking around on the internet, we couldn’t find that many tutorials (or even people who had actually done it in the first place). What we did find was severely lacking in either finesse, materials, or dedication. As we soon found out, if you weren’t willing to sink about $350 and four months of your waking life into the project, the end result wouldn’t be worth the sacrifice. Then we found the exception.

This instructable is going to start a little differently than most – with a word of thanks. Without his work and documentation (little though there is), none of this would have happened and we would have given up from not even knowing where to start. Harrison Krix of Volpin Props created the first real ASHPD, and his work also served as the basis for ours. His lack of real numerical documentation actually made the process much more fun and interesting as it forced us to rebuild his methods through guesswork and a little luck. It allowed us to create our own path, loosely based on his, that arrived at approximately the same place.

(We also didn’t have as much money to throw into it.)

We studied his pictures and made sketches as though studying for an upcoming test and slowly began our own journey into the world of Portal.

(Though first of all, we need a quick introduction! I, Joe, [the one writing at the moment] was responsible for the electronics, and my partner, Shelley, was responsible for the carving and for things requiring a steady hand, which I generally lack. For the rest of the gun, though, our efforts and skills were combined in such a way that we could probably refer to our creation as our nerd-child. And what a lovely nerd-child it is…!)

(Thanks to everyone who voted for us in the LED contest!! We managed to walk away with a Kindle, and for that we are incredibly pleased. Thank you again for showing your love!)

 
 
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Step 1: Ingredients!

We bought and used a lot of things to make this project, and it was worth it all. Here's a more or less complete list:

Core:
4” diameter PVC pipe
3” diameter PVC pipe
2 4” PVC couplers
Lots o’ Cardstock (We managed to use about a 30”x24” sheet over the course of the gun)
About a gallon of Bondo + extra hardener (We blew through two quart containers and then gave up and bought a gallon. It’s still holding us)
Florists Foam (The largest we could find was about 3’x1’x4”, and it worked pretty well once we cut it in half and glued the halves together)
Superglue
Drywall Spackling
Gesso (a very bright white canvas primer)
Craploads of sandpaper, from grits 80-600. Trust us, you’ll need them.
Spraypaint: flat black, pure white, and clear coat gloss.
Plexiglass – amount unknown; we didn’t keep track because we had a near unlimited source.
Electrical Tape
1” glass lens
¼” black tubing
9 screws and nuts
20 gauge beading wire
dowel rod
Clear toilet plunger handle (preferably an adult sized one if you can find it – we used a child sized one ‘cause that’s all we could find, but there’s no room for error)
2 ½” diameter clear plastic tube
Packing foam
Painter’s tape
Plastic wrap


Electronics (Optional):
11 blue LEDs
11 orange LEDs
3 red LEDs
4.5v power supply (3 AA’s)
25 68 ohm ¼w resistors
about 6 feet of CAT5 cable
2 switches
some method of prototyping

Required:
Optimism
Patience
Steady hands
A willingness to get your hands dirty
Working knowledge of various power tools
A large work space (in our case, a living room, kitchen, and front yard gave their lives for this project)
 
nerd12 says: Jan 7, 2013. 3:52 AM
i am planning to make the shells out of pepakura, plaster the inside with bondo, then spend the rest of my life sanding the shell. i have a few questions though, is there any good way for mixing bondo in the right proportions? i have used similar things such as resin before, and it is an utter pain to get the proportions right. to top it off, the manufacturers like to skimp on the hardener, which can result in soft/weak results. i once waster a quarter a bottle of resin due to not enough hardener.
any suggestions? thanks.
apace3 says: Jun 23, 2011. 3:28 PM
So I may have missed this, but how much did making this cost overall?
ThePropNerds (author) in reply to apace3Jun 23, 2011. 4:08 PM
About $350 in raw materials -- thousands of dollars in time and angst. :D
4lifenerdfighter in reply to ThePropNerdsNov 30, 2012. 10:19 AM
What contributed most of that cost? The bondo?
BaronVonBAMF in reply to ThePropNerdsOct 15, 2012. 10:23 AM
Thanks for making this. I learned from your mistakes and others to make this for around $60. And Again Thanks SOOOOO much for this :D
4lifenerdfighter says: Nov 30, 2012. 10:08 AM
Is there a way for me to get small pieces of PVC? I'd rather not buy in 10 foot lengths from Home depot or Lowe's.
ryan1271 says: Oct 26, 2012. 12:45 PM
How did you cut the acrylic sheet? I tried cutting it with a jigsaw but it promptly cracked horribly. Maybe I need a different blade.
Boxador says: Oct 10, 2012. 4:50 PM
Where is the plexiglass used?
CptShelly in reply to BoxadorOct 10, 2012. 9:18 PM
On the claws. I also used my leftover plexiglass for my LED's :)
Boxador in reply to CptShellyOct 11, 2012. 11:29 AM
Thanks, Cpt! Next question (I am getting full on ready to make this so there will probably be many questions to follow) - They used a modified 4 battery holder, can I just go with a 3 battery holder? I didn't really think there would be a problem with that, just making sure I'm not missing something.

Thanks!
CptShelly in reply to BoxadorOct 11, 2012. 12:58 PM
Sure! Personally, I powered my LED's with a 9v battery, so they are much brighter :)

Bring on the questions! And good luck :D
Boxador in reply to CptShellyOct 19, 2012. 6:08 AM
Hey again,

Just curious Cpt, what did you end up using for the clear 2.5" plastic tube?
CptShelly in reply to BoxadorOct 19, 2012. 9:40 AM
Another thing I should mention is that it wasn't perfectly 2.5", but still fit inside very nicely.
CptShelly in reply to BoxadorOct 19, 2012. 9:39 AM
A tennis ball container! It fit perfectly :D The plastic from the one I found was strong too, unlike the flimsy smart bottle I gave a try at first.
I'm talking about this by the way : http://ak.buy.com/PI/0/500/229037683.jpg
Hope it helped!
Boxador in reply to CptShellyOct 28, 2012. 3:20 PM
I did it! I finished it with just an hour to spare before the Halloween party! The funny part was that no one knew who I was. :P I will post a victory picture later...once I recover from the massive amount of blood, sweat, tears, and time that went into this project. Thanks for all the help Cpt!
CptShelly in reply to BoxadorOct 28, 2012. 10:20 PM
Hoozah! I'm so happy for you :D It's been awhile since I made mine, and I still have little battle scars from it! I can't wait to see pics! :)
Shine602 says: Oct 14, 2012. 8:22 AM
hi im having a problem with the barrel. i cant get it to look anything like yours. and i cant find any flourist's foam or whatever it is? thanks for your help and for the great project in advance
DrewJM says: May 2, 2012. 7:42 AM
the five 1/2 inch rings what are those? is it from another 4" pvc or what?
CptShelly in reply to DrewJMOct 6, 2012. 8:36 PM
Cardstock.
DrewJM in reply to CptShellyOct 10, 2012. 7:42 AM
So where would one buy this card stock? all the card stock i have is really thin.
CptShelly in reply to DrewJMOct 10, 2012. 8:58 AM
Honestly, cardstock is a fairly generic term for thicker "paper." I'd look for something like a foam core board. You can find those in most craft stores :)
DrewJM in reply to CptShellyOct 11, 2012. 1:35 PM
Ok so you just rap paper around it?
CptShelly in reply to DrewJMOct 11, 2012. 10:54 PM
No no, there's no wrapping here. Just get some thick cardstock such as a foam core board for the rings :)
DrewJM in reply to CptShellyOct 12, 2012. 8:28 AM
Haha Ok i got it Thanks :)
CptShelly in reply to DrewJMOct 12, 2012. 12:27 PM
No problem! Let me know if you have any other questions :)
DrewJM in reply to CptShellyOct 13, 2012. 6:11 AM
Ok will do!
nerd12 says: Oct 13, 2012. 12:39 AM
in step 6, the front core looks much thinner than the couplers.
you used 4 in pipe for the outside of the front, and the couplers are also 4 in, so why is there so much side diffrence between them? the couplers look like 5 in.
Mew14 says: Jun 4, 2012. 10:46 PM
I think that this is going to be my summer project, but i need the tmp files to work, why can't i get them to work? I've looked online for a tmp file reader, but haven't had much luck so if you have any knowledge of why, then it would be greatly apreciated.
Boxador in reply to Mew14Oct 11, 2012. 11:46 AM
Download the tmp files and change the .tmp to a .docx. Ta-da!
CptShelly in reply to Mew14Oct 6, 2012. 8:35 PM
A tmp file is unfortunately a temporary one, which would only work on their computer. Fortunately, they have pictures of the pieces on a ruler/measuring board, so I used that as reference to make mine!
CptShelly says: Oct 6, 2012. 8:32 PM
Thanks for the instructions! I just completed mine today :D Here's a picture: http://distilleryimage0.s3.amazonaws.com/fc48f90c102a11e28c3c22000a1fb85a_7.jpg
Took me two and a half weeks to make, and cost me under $100, so those of you who saw the maker's 6 months and $350, no worries! It's totally doable with the money and time I spent/took to make this :D If you have any questions, you can go ahead and ask.
The spackle tuned out to be my worst enemy. I had an issue with the paint eating it away, thus causing these soft spots to appear throughout the shell. It was a very painful discovery, since I thought I was finally done, but I found some magic sculpt resin & hardener thats FIVE THOUSAND times better and more reliable than spackle. It's so easy to use to fill holes and cracks, and easy to sand afterwards.
Anyway, PEOPLE- ASK ME ANYTHING! I've got this thing fresh on my mind. :)
DrewJM in reply to CptShellyOct 10, 2012. 9:59 AM
Thanks it did also I'm in the process of making the shells what did you use to sculpt these and what did you use as a model?
CptShelly in reply to DrewJMOct 10, 2012. 11:30 AM
Well, like in the instructions here, I made my shells out of florist foam and bondo. I had to glue several blocks of florist foam together to get the size I needed. After making my own blueprint of the gun, I copied the shape of the shell to another piece of paper, cut it out, and taped it to the side of the florist foam block. I just did the sides first before doing the front and back. Since there were no blueprints for the front and back, I just got my pvc pipe (the one that will eventually be underneath the large shell, the two couplers that are glued together) and carved the outline of where it would be on the front of the large shell, then carved away. I kept checking back to make sure the couplers fit in the shell. Personally, I had to carve a little more than the size of the pipes, since I ended up bondoing the inside as well.

When sculpting the basic shape of the shells out of the florist foam, I used a regular kitchen knife, but when I started doing the curves, I used one of these:
http://www.creativecoldsnow.com/prodimg/KEMFW11.jpg
which made it easy to carve out the shape.

I'd list you the dimensions of my shells, but unfortunately I don't have my portal gun with me at the moment. Personally, I didn't really go for any specific dimensions; I just made sure the shells had enough space around the pvc pipes. :)
DrewJM in reply to CptShellyOct 10, 2012. 7:44 AM
and where did you get the claw like things on the end of the gun?
CptShelly in reply to DrewJMOct 10, 2012. 9:13 AM
Here are my claws "naked" http://i.imgur.com/7ZWvI.jpg
The claws are made of wood, bolts, washers, acrylic sheets, and some random stuff I found for the tip of the claws.
From my understanding, the people who made this tutorial made their claw tips out of wood. I however made mine out of this random plastic bit I found (and sanded down to the shape I wanted it to be) and I attached it to the top of half a plastic clip, sort of like this: http://honghui.imould.com/product/honghui/17.jpg (but only one half of one) which I also cut/sanded down to size, so that it would be easy to install since it had those holes.
Hope this helped! Let me know if you have any other questions :)
CptShelly in reply to CptShellyOct 6, 2012. 8:34 PM
To add to this, this was the first ever weapon/prop thing I have ever made.
rbirri says: May 25, 2012. 1:56 PM
The piece holding the lens for the LED that slips into the top hole, what is that made up of, or is it a single piece you bought somewhere?
CptShelly in reply to rbirriOct 6, 2012. 8:33 PM
They made theirs out of cardstock, but I however made mine out of the extra acrylic sheet that I had. :)
nerd12 says: Oct 6, 2012. 8:31 PM
the instructable was really handy but i might have to compensate in some areas because i don't have about half the tools :(
one question, how strong is florists foam? and how porous is it? carving porous foam is a true pain, because it will bend and not get cut, then it will tear.
is it possible to substitute fiberglass and resin? they might be better for the shells.
rbirri says: May 24, 2012. 8:34 AM
I know absolutely nothing about wiring, so please excuse me if this is a stupid question. Once you have the wiring laid out and you are attaching the LED's and the resistors, do you just wrap the wire around the ends and bend them in? Or cut off the excess? I guess my real question is how do you solidify the contact between the two and what do you do with the excess?
mrmerino in reply to rbirriAug 30, 2012. 1:55 PM
To attach them, a soldering iron is generally the best option. You can grab one at Radio Shack or a hardware store for a couple bucks. There are lots of tutorials here to help.
rbirri in reply to mrmerinoAug 31, 2012. 4:07 AM
Thank you!!
escabatum_rip3 says: Aug 26, 2012. 12:46 PM
Just wanted to again say thanks for such an awesome guide! I followed it almost to the letter - a few things I changed: I have no power tool or bondo experience so I used telescoping 3 inch and 4 inch cardboard mailing tubes for the body, spackle for pretty much everything bondo was supposed to be used for, a lot of exacto knife and box cutters (even kitchen knives for carving the florist foam),, a lens that we happened to have from a lab my fiance has worked in, and for the electronics we did everything in parallel. Also the plastic tube I found to use was from some long electrolyte-infused bottle of water I found at Safeway - probably about 1/4 inch longer in diameter than ideal but it worked okay. Here's a few pictures of my finished product posted on my blog: http://embracing-obsession.blogspot.com/2012/08/halloween-1309.html
randomdude2 says: Jul 29, 2012. 3:57 PM
Just finished my own portal gun and it looks great! but i would work on the barrel design if i were you, to reduce the amount of Bondo used.
nekokristiaan in reply to randomdude2Aug 21, 2012. 8:21 PM
Pics or it didn't happen.
tooljockey14 says: Jun 10, 2012. 6:59 PM
How much did it all cost in the end?
TheKrazyKOW in reply to tooljockey14Jul 10, 2012. 3:57 AM
If you read it. it clearly says that it all cost approx $350.
baterman says: Jun 30, 2012. 10:56 AM
Thanks for this Instructable! Me and my dad are making one using this and indy moguls version :D
jgibson12 says: Jun 29, 2012. 8:17 PM
OH WOW!!! AMAZING !! I HAVENT SEEN A PORTAL GUN THIS AWESOME BEFORE!
escabatum_rip3 says: May 27, 2012. 1:53 PM
I'm in the process of making a portal gun as well, a bit more low-budget, but similar build idea - I am trying to find a dremel that would work and I have no clue what specifications I should be looking for in terms of bore, rpm, etc - any suggestions? Amazing portal gun btw and thanks a bunch for the instructibles guide. (I read through the comments thread and did not see this specifically addressed anywhere, so sorry if it's already been asked)
kragonk says: May 15, 2012. 6:59 AM
that's so awesome
DrewJM says: May 1, 2012. 9:27 AM
What did you use to cut the PVC pipe Please help.
OshawottZ says: Apr 30, 2012. 5:10 PM
Where do you put all the wires? Under the front core?
ThePropNerds (author) in reply to OshawottZApr 30, 2012. 6:21 PM
The wires are all in the back half of the core behind the light bar assembly -- the ones that go to the front are run underneath the light bar setup, hidden by a piece of black construction paper.
Atlas Portal 2 says: Apr 16, 2012. 8:13 PM
THIS IS SO AWESOME AND SO ARE YOU GUYS I LOVE THIS IM A HUGE PORTAL FAN (you should see my wall) AND IM GOING TO GO MAKE THIS RIGHT NOW!!1
Ethan B says: Apr 15, 2012. 5:47 PM
"Do not look into the operational end of the device."

What the heck man! Are you trying to kill us??!
OshawottZ says: Mar 31, 2012. 4:08 PM
How do you add the red lights at the claws... (and if it's in the directions srry, i kinda skimmed...) please help.
jedirampage in reply to OshawottZApr 9, 2012. 2:51 PM
for the LED that is mounted at the top all you have to do is drill a small hole at the top and run the CAT5 cable through to wire it. Same thing for the bottom LED's but you will have to cut a hole through your shell as well.
amazingly awesome instructions says: Apr 7, 2012. 8:15 AM
It would be really cool to add a built in smoke ring generator because the rings would light up and it would sorta look like the portals travelling through the air
ermjr98 says: Mar 31, 2012. 6:16 PM
Could you possibly list the dimensions? I am just wondering the length of the shells from front to back, it would be really helpful in drawing my blueprint. Thanks!!
DrewJM says: Mar 30, 2012. 9:48 AM
How did you make the cap things that the plunger slides into?
DrewJM says: Mar 25, 2012. 6:06 PM
where di you get the "horse pieces" If you made them how?
DrewJM says: Mar 24, 2012. 6:22 PM
How did you make the barrel? and how did you carve the shell?
draik41895 says: Mar 23, 2012. 11:39 AM
What exactly did you guys use to make the "moon shaped bracers", and while im here, did you cut the tips of the claws out of acrylic as well?
bluelettuce says: Jul 15, 2011. 3:39 PM
What are the claw pieces made from?
ThePropNerds (author) in reply to bluelettuceJul 17, 2011. 7:32 AM
Raw 1/8" acrylic sheets.
~joe
jedirampage in reply to ThePropNerdsMar 17, 2012. 12:20 PM
Where did you guys buy the acrylic sheets from?
AnnikaSkywalker says: Feb 29, 2012. 3:57 PM
The one I started making is from Backyard FX and it has a video. Maybe you could do something with the combined knowledge. http://www.indymogul.com/backyardfx/episode/bfx_20110606/cheap-portal-gun-diy
ryo786 says: Feb 22, 2012. 12:55 PM
Hey, how much did It cost you to make this?
Innuendo Props says: Feb 14, 2012. 5:49 PM
For some reason I cant open either of the templates listed for the gun. Please help.
jschrold says: Feb 14, 2012. 4:17 PM
Hey, Ill pay you for the front white piece and the back white piece, how much would you want?
sofiadragon1979 says: Feb 5, 2012. 11:29 PM
You really should show a video of how it looks when it's all lit up.
aak3 says: Nov 17, 2011. 10:46 AM
Hello there! I will be willing to pay for 50$ or more! Max 100$ im a 12 year old KID

-Aak3
The Chunky Sniper! in reply to aak3Jan 31, 2012. 11:17 AM
That comment made me chuckle.
Fredashay says: Jan 7, 2012. 8:14 PM
Ya' know. I just finished Portal 2, and I just might try building one of these things. But being a guy, I can't cosplay with it. But I'd love to own one anyway.

But ya' know what else I'd love to have? A full size, fully animatronic, replica of GLaDOS hanging from my ceiling. Give her motion sensors to sense when someone is in the room, a microphone and speaker, and an AI like Cleverbot.com but that sounds like GLaDOS. That would be awesome! (just don't give her any neurotoxin)
GoKupsGo says: Oct 27, 2011. 9:45 AM
Couple of questions, and sorry if they've already been asked. There are a lot of comments.

1) How did you end up attaching the barrel and cores? Was it very fragile or was everything sturdy?

2) How did you hide the wiring for the LEDs in the barrel of the gun?
ThePropNerds (author) in reply to GoKupsGoDec 4, 2011. 5:05 PM
Weird, I didn't get an email for your comment, so I'm seeing it now for the first time. sorry :( Answers!

1) The barrel WAS attached to the core using a rather elaborate pin and hook system, right before it broke thirty minutes before the costume show. We ended up just flat out supergluing the barrel to the core. It's still there, so I guess it worked pretty well!

2) The wiring for the LEDs is under a piece of black construction paper underneath the clear tube.
goldenplatypus says: Nov 17, 2011. 4:17 PM
I an in love with portal/portal 2 and would pay almost anything for (within reason) one. I am constantly looking for a portal gun and turret to display and show off. (being twelve I will HAVE to play with it a little, but it'll be fine) again I am very willing to buy a portal gun that actually looks realistic and works. Please email me if you are willing to sell. I am constantly up until midnight doing schoolwork and have no time to build. 9998722@gmail.com is my email please be reasonable if you are willing to sell but if not a polite "no" will be accepted, but please reply
lzhang5 says: Nov 16, 2011. 7:57 PM
what exactly did you use for the "grate and a sunburst-like black piece"?
I can't seem to find it x_____x
ThePropNerds (author) in reply to lzhang5Nov 16, 2011. 8:10 PM
The black piece is spray painted cardboard. That entire piece is hand built. As for the grating, I just cut a circle out of some grating that I believe is supposed to go in a garden, like an anti-rodent fence or something. Honestly, I don't know -- I found it on the floor of the shop :/

~ joe
superalex11 says: Oct 31, 2011. 4:42 PM
DDDAAAAAAGGGHHHHH!!!!! I LOOKED INTO THE OPERATIONAL END OF THE DEVICE!!! I'M BLIND!!!!!
GLaDOS V_3.11 says: Jul 14, 2011. 8:43 AM
(so much comments!) this is a really cool portal gun. one more thing... what about the aperture science logo on the left side of the gun?
ThePropNerds (author) in reply to GLaDOS V_3.11Jul 14, 2011. 12:20 PM
We didn't have enough time to make the graphics before the contest was over, but when we do a mass update of this instructable we'll add in a little about them. :)
~joe
GLaDOS V_3.11 in reply to ThePropNerdsOct 26, 2011. 9:36 AM
cool. i have been trying to make a portal gun like this, but using foam is so much work. did you use a dremel to carve out the foam? im considering that or a bicycle helmet for the large shell.
prime89 says: Oct 22, 2011. 7:17 AM
 I don't know if any of the other comments suggested this, but you could make another thing like the red lights under the arms ,or whatever those are called on the end of the gun, could turn into just white like a flash light like you were picking something up. This is the thing from the game im talking about-* Click here* Go to 0:25. When he picks up the companion cube with the Portal Device. Like when the electricity comes out. But are you going to add sound effects?
ssc1980 says: Oct 18, 2011. 9:20 PM
Dumb question: the 3" and 4" PVC (ABS, really) pipe at Home Depot has a 4" *inner* diameter, as do the 3" and 4" couplings, so the couplings don't actually fit over the abs pipe.

Should I be getting smaller pipes or bigger couplings?
craftguy says: Oct 14, 2011. 9:29 PM
for some reason on mine the orange lights work fine but when i switch to blue they light up bright then fade so that they are barely glowing at all. its as if the power to the blue ones is being drained away when i turn them on. what should i do?
ThePropNerds (author) in reply to craftguyOct 17, 2011. 9:16 AM
Wow... honestly, I have no clue. Do the orange ones still light up brightly when you switch it back?
~ Joe
craftguy in reply to ThePropNerdsOct 17, 2011. 7:04 PM
yeah they do. ive decided to make it simpler and just use two separate battery
packs.
dhughes14 says: Aug 4, 2011. 2:29 PM
Those small wooden triangular pieces - are they the end pieces of each arm?
I had somehow had the idea from a previous step that they were the small "nub thingies" that connectect the large black wires to each shell.
kvnfln9000 in reply to dhughes14Oct 13, 2011. 7:14 AM
they go where the J-hooks are placed
dhughes14 in reply to kvnfln9000Oct 16, 2011. 5:10 PM
I see. Thank you very much, I was confused.
GroggDog says: Oct 12, 2011. 12:25 AM
How did you manage to get the ''roundish'' form on the big shell? I'm sitting here with a cube and don't know how to do :(
kvnfln9000 says: Oct 11, 2011. 4:30 PM
organic peanut butter or some thing like skippy
CAMM says: Jul 31, 2011. 6:40 AM
How did you get the Bondo all the way underneath the PVC, did you apply that part with it seperated then slide them back together? Or some how force fill from the sides?
ThePropNerds (author) in reply to CAMMJul 31, 2011. 7:18 AM
Underneath? If you're talking about the third picture, you're looking at one of the cardboard spacers. Also in the third picture, you can see how it's kind of dripped in from the sides -- all we did was layer it in from the sides and sand it down a little. Layer / sand, layer / sand, layer / sand -- endlessly. Something you'll find when working with bondo is that frequently you'll get little pits as it dries -- I don't know how to get around that, other than layering on more and sanding. A light application of spackle might work once you've got the final layer of bondo on.

Does that answer your question? ~joe
knan12 in reply to ThePropNerdsOct 1, 2011. 2:06 AM
does it have the mysterious substance
?
karnold70 in reply to ThePropNerdsSep 27, 2011. 1:47 PM
It would save a LOT of bondo if you used foam spacers the length of the tube, inset about 1/2 inch from the edge. This would mean that you're just using the bond for the EDGE, to make it smooth. BTW, a perfect spacer inside the 4" pipe is a slice from a 3'' cap or adapter. ( OD of the cap fits perfectly the ID of the pipe)
randomdude2 says: Sep 28, 2011. 5:50 PM
awesome! I'm currently trying to build one, so cool!
karnold70 says: Sep 19, 2011. 11:10 PM
It's such a shame that it cannot be taken apart. I'm salivating to make one, but it would have made it soooo much easier if you had made MOLDS of the parts, and been able to cast and SELL them to us lazy (I mean 'somewhat less industrious) individuals. BEAUTIFUL work, you two!!
ThePropNerds (author) in reply to karnold70Sep 26, 2011. 5:41 PM
The thing is, we can take it apart, but we can only take it apart once and it will take about two hours to do. If we make molds (a considerable financial investment for us), would you be interested in buying some casts? (This goes as a general question for anyone who reads this, as well.) Email us. thepropnerds@gmail.com
karnold70 in reply to ThePropNerdsSep 27, 2011. 1:15 PM
I sent you an e-mail, but for the benifit of all, I'll reiterate my main points;
YES I would be interested. I was thinking of making my own and then casting resin coated foam-core parts. it would really help with the weight. Also a more natural grip handle, possibly from a toy gun, with a simple pressure switch in the handle for power (whenever you grip, it powers up) with another small switch by the inside of your thumb to change colors. I cannot say too much about the amazing CURVES you managed to create with no instruments. I would be hard pressed to re-create them. All in all, definatly in the TOP 5 instructibles I have ever seen.
lpots says: Sep 20, 2011. 8:43 AM
Hi,
has anyone ddone this already? I just want to know how much does building this cost?
thank you
tvarnum in reply to lpotsSep 26, 2011. 4:44 PM
Actually, yes. A dude named Harrison Krix made a good few and Auctioned them off. http://volpinprops.blogspot.com/2009/01/testing.html here is the how to on his blog.
lpots in reply to tvarnumSep 26, 2011. 5:27 PM
But the price for the individual pieces? the price to produce one, I want to make one, but In case I dont do very well, I dont want to waste too much money.
GLaDOS V_3.11 says: Jul 14, 2011. 8:36 AM
would it be possible to leave 3 1/4" on the 3" diameter PVC pipe instead of it being a completely different piece for the barrel? so you don't get confused by my lack of clarity in this comment, I'm talking about the barrels attachment to the core. to save glue, would it be possible to keep 3 1/4" attached to the 3" diameter PVC? (wow i just realized i made this comment a lot harder to understand!)
icysocks in reply to GLaDOS V_3.11Sep 24, 2011. 8:07 PM
As soon as I thought that, your comment said it lol. Yeah, instead of sawing both of the PVC pipes at 8", leave the 3" at about 13", then you can just ad some rings to it instead of building a whole new barrel piece. I got it :)
karnold70 says: Sep 19, 2011. 11:14 PM
Oh, for a wood (or metal) Lathe...
LunaSweetBlood says: Sep 11, 2011. 11:19 PM
I will love all of you forever if you could send me a pattern for what you used here. This is the part i'm having the most difficulty with.
ThePropNerds (author) in reply to LunaSweetBloodSep 18, 2011. 12:37 PM
And I'd love to welcome that love, but we honestly don't have a pattern for this. I could take a couple rough measurements, but due to a rather serious design flaw on my part we can't actually take the gun apart for me to get things like depth. I say draft what you can until it looks about right. We just drew on the side of the block before we started carving and then Shelly went all out on the poor thing :)
~ joe
Glaceon says: Sep 5, 2011. 8:26 PM
Great instructable! I was just wondering how PORTALble ( Haha I know, spelled wrong. Couldn't help it! = P ) this is. I was thinking as going as Chell for Halloween, and was wondering if it would be good for walking around in crowded areas and things of that nature. From the photos it looks as if you can only put your hand in a small distance, and it looks like you have to support it with your other hand.
ThePropNerds (author) in reply to GlaceonSep 11, 2011. 9:05 PM
The way we built it, it is actually quite heavy. We don't have a scale, but I'd put it in the neighborhood of eight to twelve pounds, with most of that being situated towards the front of the gun, held away from the body. It gets very tiring very fast to hold the gun for long periods of time. For the back of the gun, there is actually a handle that your right hand holds onto -- it does make it a lot easier.

It's okay for wandering around in crowds -- if the costume's good, people will naturally give you a wide berth. We did have one instance where a claw snagged on someone's clothing and bent backwards, but there was no permanent damage, so all was good :) Does that help?
Glaceon in reply to ThePropNerdsSep 15, 2011. 10:46 AM
Yeah, I think I get the gist of the weight. I think I may try making a lighter look-alike instead. Thanks for the reply! = ]
pgonzález muñoz says: Sep 1, 2011. 4:15 PM
Hi!

I've been reading the tutorial and looking for hardware stores for buying the materials but in my country (Spain) 3M does not sell Bondo... so can you confirm me if it is epoxi resin? I'm just not really sure what I have to look for... (the other things I already know where to get them )

Thank you very much!
ThePropNerds (author) in reply to pgonzález muñozSep 11, 2011. 9:13 PM
Bondo is not an epoxy resin -- it's a polyester resin. Honestly, I'm not sure how to help you. Here's the article I found explaining what it is, but beyond that, I really don't know what kind of materials would be similar. :( http://en.wikipedia.org/wiki/Bondo_(putty)

~ joe
notimeforfacts in reply to ThePropNerdsSep 13, 2011. 4:05 AM
Bondo is the name of the brand, you should be able to substitute any other brand of polyester body filler, which you should find in abundance at car parts shops :)

Epoxy Resin is used as a strong adhesive, and comes in the 2-part syringe packs
jacob1112 says: Sep 4, 2011. 7:52 AM
May I ask, how you determined the resistor for the LEDs? I used the calculator on superbrightleds.com and the numbers werent meshing with yours. I don't doubt that yours works I was just wondering how you determined a 1/4 watt 68 ohm resistor to be best.
ThePropNerds (author) in reply to jacob1112Sep 11, 2011. 9:10 PM
We used the calculator found here: http://led.linear1.org/led.wiz

We got it by just googling "led resistance calculator". It only asks for a few numbers, and here's what we used:

Source voltage: 4.5
diode forward voltage (what the LED needs to run): 3.3 (A generic number if you don't know)
diode forward current (in mA): 20 (Also a good generic number)
Number of LEDs in array: 14 (for each color, since only 11 colored LEDs will be lit at any given time plus the three red ones in the front, we calculated for 14)

Does that help?

~ Joe
jacob1112 in reply to ThePropNerdsSep 12, 2011. 6:30 PM
Yes this does help thank you! I've been referencing this a-lot. I'll make sure to post some pics when I'm done.
jacob1112 says: Aug 31, 2011. 6:00 PM
This is an awesome build! I am actually building one of my own portal guns very similar to this (slight variations), and will be using this as a major reference. I do have one question though. How much does your portal gun way in total?

Once again great job guys!
ThePropNerds (author) in reply to jacob1112Sep 11, 2011. 9:16 PM
I'd say about 8-12 pounds. We don't have a scale, so we can't give a more accurate total. Thanks for the props :)

~joe and shelly
ultmar says: Sep 6, 2011. 6:37 PM
Hey, Great work... looks really realistic.... i was wondering if you could make me one???? and if you could how much it would cost me in AUD... if you were able to make one for me it would be AWESOME!!!!!!!!!
zakatan says: Aug 25, 2011. 2:49 PM
still no luck on that file
William930 says: Aug 23, 2011. 7:25 PM
should i keep adding bondo and sanding, or should i start adding the lightweight spackle
DSC01404.JPG
ThePropNerds (author) in reply to William930Aug 23, 2011. 8:29 PM
Keep sanding -- you'll need the shell completely smooth before you're ready for the spackle. The spackle's just there to fill in the little holes, like the ones I see towards the bottom. Other than that, it looks great so far!!

~joe and shelly
William930 says: Aug 22, 2011. 4:07 PM
i recommend adding hardener to the bondo until it is a salmon color
rmendez6 says: Aug 20, 2011. 1:50 PM
do not look at the operational end of the device
rmendez6 says: Aug 20, 2011. 1:23 PM
i dont know how to do it hope you have fun :)
sonicgreg says: Jul 17, 2011. 2:59 PM
How would you describe working with the dry florist foam?
Everyone I know says it falls apart in your hands and, having never touched the stuff myself, I want to ask if you had any trouble with it or a technique to make my little project look atleast some percentage as good as yours.
ThePropNerds (author) in reply to sonicgregJul 17, 2011. 8:51 PM
I worked with a floral foam that was structurally more like Styrofoam than the crumbly dry foam typically used in floral arrangements. It's still called "floral foam" but the cells are bigger and the block is less dense. In the Instructable I mentioned I used a large serrated kitchen knife. Honestly, it worked wonderfully. Hold the knife horizontally in front of you with the blade downward like you are holding up a shirt by the shoulders and drag it forwards and backwards over the foam to grate sections off gradually. Hope this helps!
~ Shelley
sonicgreg in reply to ThePropNerdsJul 26, 2011. 1:29 PM
Thanks for replying, How durable would you say it is after it's all carved and bondo-ed and sanded? Durable enough that you could be confident that a kid could play with it without it scratching or breaking?
ThePropNerds (author) in reply to sonicgregAug 19, 2011. 11:16 PM
Mmm! Update! I accidentally dropped an angle bracket on the rear shell while building the box to transport it to GenCon, and the bracket punched a neat hole right through the shell. So basically, it's solid enough to hold its shape and feel good, but it is pretty fragile. ~joe
ThePropNerds (author) in reply to sonicgregJul 26, 2011. 7:16 PM
Honestly, I don't know. The bondo is pretty solid, but I hear it shatters if dropped. Personally, I'm not letting my 7-year old brother within ten feet of the finished gun, so I don't know how it would hold up. A lot of parts of this gun are fairly fragile, especially the claws, so I wouldn't recommend it as a kids toy. ~joe
sonicgreg in reply to ThePropNerdsAug 3, 2011. 5:13 AM
One last question, where do you find this foam?
A craft store?
Micheals?
Or an actual florist?
jacob1112 in reply to sonicgregSep 5, 2011. 8:51 AM
I found some at a local Walmart. They came in 1'x1' blocks. 1 should be enough for the back shell. You'll just need to cut and move a 1" slab from the top and glue it to the side.
1'x1' same volume as 3'x1'x4"
ThePropNerds (author) in reply to sonicgregAug 10, 2011. 6:09 AM
We found it at a mom-and-pop craft store just a little away from school. We bought the largest block they had, cut it in half, doubled it up, glued it together so we had a large block, and then worked with that. ~joe
jackjackattack says: Aug 9, 2011. 11:09 PM
how long did it take to build the portal gun?
ThePropNerds (author) in reply to jackjackattackAug 10, 2011. 6:06 AM
About three and a half months of on and off work due to school and three months solid during the summer, so about six and a half months all told.
tswafford says: Aug 9, 2011. 10:01 AM
This I found could also work for the Tube ? Amazing work on this portal gun im in the middle of building my own.

ThePropNerds (author) in reply to tswaffordAug 9, 2011. 1:58 PM
Oh wow! That's almost tailor made! It's just a little too big, though - you're looking for something that's 2.5", not 2.75". The reason is because you're gonna put 1/4" of foam all around it in order to isolate it from the core and make it "float", and 1/4" on both sides makes it an extra .5" thick, and since it needs to fit in a 3" tube, then 2.5" diameter for the clear tube is the magic number :) ~Joe
zombeastly says: Aug 5, 2011. 5:04 PM
the cake is a lie..............................the blueprint is not!!!!!!!!!!!!
dhughes14 says: Aug 4, 2011. 1:51 PM
Altoid stilts XD
tinker234 says: Jun 20, 2011. 6:20 PM
hey can we make a working one
sonicgreg in reply to tinker234Jul 26, 2011. 1:23 PM
Sure! start investigating black holes, rifts, and wormholes and find how to conjure up two linked ones, then find out how to fit that into the gun and you'll be set! It'll be ready before 40XX!!!
tinker234 in reply to sonicgregJul 26, 2011. 4:13 PM
OK MORE DESCRPETION
dombeef in reply to tinker234Jul 31, 2011. 8:39 AM
You cant make one. Or atleast with stuff around the house...
tinker234 in reply to dombeefJul 31, 2011. 1:59 PM
well what could i use maybe a gunn htat ifres a wormhole gentar
dombeef in reply to tinker234Jul 31, 2011. 2:32 PM
Translation: Well what could I use? Maybe a gun that fires a wormhole center(I dont get the last word)
Please use spell check, it looks like a 9 year old is writing that.

And to your comment, it is impossible to to make a worm hole on planet earth, especially at home with a gun, if you do manage to make a worm hole, it would be nearly impossible to move it, and to get it to "stick" to a wall.
tinker234 in reply to dombeefAug 1, 2011. 8:20 AM
well you got a point
sonicgreg in reply to tinker234Aug 3, 2011. 5:12 AM
Actually there is a "blueprint" of the device saying that the portals are generated by a miniature black hole contained in the device, the beam runs through a little dye compartment then before coming out of the device, and if you pay attention the portal beam hits, swirls particles for a sec, then opens, proving that there must be some magnetic properties or some sort, and it is noted that moon rock paste is a great portal conductor, implying that this surface can sustain and hold the portal to it.
tinker234 in reply to sonicgregAug 3, 2011. 5:49 AM
yep
dynamic seagull says: Jul 31, 2011. 8:00 AM
I'm having trouble figuring out the width of the big shell. Would you be willing to give that dimension.
Science Swine says: Jul 30, 2011. 9:11 AM
How much would it cost to build this? It is incredible, congratulations.
lvaughan1 says: Jul 26, 2011. 8:48 AM
So...what happens if I have no handiness skills or tools? :)

It's really amazing, though! I might make my dad help me. Or, I mean, I will. Because of above statement :x
dombeef says: Jul 25, 2011. 4:43 PM
I have to make this!
dynamic seagull says: Jul 24, 2011. 8:12 AM
What glue did you use to glue the foam together when you cut it in half?
ThePropNerds (author) in reply to dynamic seagullJul 24, 2011. 9:17 AM
We actually used wood glue because it was what we had on hand. All you need to have is something a dremel (or something similar) can cut through when the glue has hardened.
dynamic seagull says: Jul 23, 2011. 1:45 PM
What "color" of hardener should I get. On amazon there's white and red. Heck am I even looking at the right thing? Here's what I'm looking at.
http://www.amazon.com/2-75-OZ-RED-CREAM-HARDENER/dp/B000P1E2LM/ref=sr_1_11?ie=UTF8&qid=1311453747&sr=8-11
Thanks!
ThePropNerds (author) in reply to dynamic seagullJul 23, 2011. 3:17 PM
Yep, that's it! Since you'll be painting it, you should definitely get red. The only difference in color of hardener is what color the bondo turns as it hardens, so if you get white, it'll be really hard to figure out when you've got enough hardener in there. And since you'll be painting it, it doesn't really matter anyway! :)

However, when I look at your link, the first thing that stands out is that amazon wants $10 for shipping, which is outrageous. You can buy those tubes at pretty much any large hardware store for about $5, which is what we bought ours for. Unless you don't have access to a Lowe's or Home Depot (or something similar) I'd suggest buying it in a store.
dynamic seagull in reply to ThePropNerdsJul 24, 2011. 7:54 AM
Thanks!
gumby_arobics says: Jul 5, 2011. 2:08 PM
i can't access the template D:
ThePropNerds (author) in reply to gumby_arobicsJul 5, 2011. 10:13 PM
Try right clicking the file name > Save As > arm pieces template.docx > any file type> okay. That should work. If it doesn't, just rename the extension of the file you downloaded from .tmp to .docx and it'll work :)
~joe
sonicgreg in reply to ThePropNerdsJul 17, 2011. 6:16 PM
When I do that it still says error.
My computer wants to save it as a word doc or a winrar zip file, can you make it into a .pdf or something other than whatever it is then upload that?
gumby_arobics in reply to sonicgregJul 18, 2011. 12:03 PM
yea same here :/
ThePropNerds (author) in reply to gumby_arobicsJul 23, 2011. 3:19 PM
Foo. Sorry y'all are having problems; I'll see if I can change it tonight.
laubrey1 says: Jul 20, 2011. 10:46 AM
What is the combined length of the 2 pvc couplers? (as I cant find plain ones like yours) Thanks _liz
ThePropNerds (author) in reply to laubrey1Jul 20, 2011. 11:18 AM
Hi liz! I'm pretty sure we used ones like this. Ours had a little nub on the end and the edges flared out a little bit. We dremelled off the nubs and then used glue on the inside of the pieces, which let us dremel a groove down the center that got rid of the flaring. Then we filled up the groove with bondo and sanded smooth. Does that help? ~joe
GLaDOS V_3.11 says: Jul 14, 2011. 9:08 AM
you need a joule thief for all this stuph
GLaDOS V_3.11 says: Jul 14, 2011. 8:46 AM
i should make a potato battery... it would be a funny little addition to the ASHPD.
GLaDOS V_3.11 says: Jul 14, 2011. 8:38 AM
the only thing i don't understand is where the handle could be placed...
geoweasel says: Jul 14, 2011. 7:04 AM
might i ask which piece is the switch?
ThePropNerds (author) in reply to geoweaselJul 14, 2011. 7:47 AM
Photo... 18, I think, shows the power switch, and the picture after that shows the color switch. ~joe
FFVIIBOY says: Jul 14, 2011. 7:05 AM
Man I would definitly make this if I wasnt so lazy, although I'l probably make this at some point
sklar says: Jul 12, 2011. 6:53 AM
question:
1. I cal orange led to 5.6 ohms in array. at 4.5 v
2. I cal blue led to 56 ohms i array. at 4.5 v

so why have used 68 ohm on the leds?

scott klar
Jason-B says: Jul 11, 2011. 7:44 PM
Awesome
that asian nerd says: Jul 10, 2011. 8:56 PM
couldn't you add sound effects? awesome replica though :)
avatar_i says: Jul 10, 2011. 4:08 PM
Absolutly freaking cool! Just one thing- you need to list 'Patience' twice, and 'Steady Hands' three times! I really want to try this one!
mtownsend says: Jul 9, 2011. 11:40 AM
I am absolutely livid. I was planning on making this for GenCon Indy 2011. I can't in good conscience use your blueprints to try and beat you in the contest. Oh well. Look for us there, I'll be with the Little Sister from Bioshock. I'm proud of that syringe.
ThePropNerds (author) in reply to mtownsendJul 10, 2011. 8:39 AM
*chuckle* Sorry we beat you to the punch!! In all honesty, we think it's pretty much impossible to do what we did in just under a month. Even after this was posted, we're still tweaking it. We've already done more modifications to the back shell and completely rebuilt the barrel... AGAIN. Hopefully we'll get some of those posted eventually.

I'm interested in making a Bioshock syringe at some point, and I'd love to see yours! Seeing what other people have done and learning from it is an important part of getting better.

We look forward to seeing you at GenCon!!
~joe
tamcg says: Jul 8, 2011. 8:59 AM
Dous it change couler or make sound?????
STICKDUDESHOOTER says: Jul 3, 2011. 2:29 AM
Hey!
Can you guys make a GLaDOS potato too?
If I could make one next year for tech i could make a potato too
ThePropNerds (author) in reply to STICKDUDESHOOTERJul 6, 2011. 6:48 PM
If this had been for Portal 2, then yes, we would have made a potato -- but as it is, we're actually debuting Shelly as Abby from Portal Prelude, where GLaDOS is unveiled for the first time and nowhere near potato stage :)
~joe
ken256 says: Jun 30, 2011. 2:39 AM
imagine this in freddiewong hands!!!lol
ThePropNerds (author) in reply to ken256Jul 1, 2011. 4:14 AM
Oh, it has been imagined... ^_^

~joe
mmerolla in reply to ThePropNerdsJul 1, 2011. 2:25 PM
Can you make me an Aperture Science Handheld Portal Device?
ThePropNerds (author) in reply to mmerollaJul 5, 2011. 12:10 PM
Can? Yes, we can. Will we? No. :P
~joe
psycokiller338 says: Jul 2, 2011. 11:25 AM
how much would all of this cost?
chevron694 says: Jul 1, 2011. 5:27 PM
Why do we need to glue and fiberglass it together? We could just get a lets say 3 inch long piece of 4' Pipe and us that in between the two couplings.
ThePropNerds (author) in reply to chevron694Jul 1, 2011. 10:03 PM
...fiberglass...? There's no fiberglass anywhere in this project. Theoretically, if you wanted to, you could cut a piece of 4" pipe (not four foot pipe, as you wrote -- that would never fit xD) to join the couplers, but we found that we needed all the space we could get inside.
chevron694 in reply to ThePropNerdsJul 1, 2011. 10:09 PM
Sorry, lol I mean Bondo Body filler not fiberglass. But I made a Type I meant 4 inches rather them 4 feet. Yea, I was asking because I didnt know if it would interferer with the "front core" when you insert it in to the "Back Core".
ThePropNerds (author) in reply to chevron694Jul 2, 2011. 6:38 AM
It won't interfere when you connect the two, because the front piece only goes until it hits the center ring in the first connector, or about a third of the way in. The reason we didn't connect the two couplers with actual pipe is that if we had, I'd've had no room to get my rather large hands into the cavity when installing the electronics. ~joe
squeesa6 says: Jul 1, 2011. 2:41 PM
How did you make the curves. What tool did you use?
ThePropNerds (author) in reply to squeesa6Jul 1, 2011. 10:06 PM
I used a tool called a spindle sander. This is one similar to the one we have: Amazon. Basically, it's a drum of sandpaper that spins 'round and moves up and down at the same time. It's really great for cutting and smoothing inside curves.
aburke1 says: Jun 27, 2011. 3:39 PM
Looks really good! Do you mind maybe updating the required item list as such things like 20 gauge beading wire and the dowel rod don't state how much you used. You may of stated it in the instructions and I didn't see it as I just skimmed it for now but plan on making one for a friend as a gift, and one for a short film since im a film maker. Anyways the results look amazing.
ThePropNerds (author) in reply to aburke1Jun 27, 2011. 5:49 PM
Wow you're right! Sorry about that. :( We'll type up a paragraph right away and insert it into the instructable as soon as we can. We used the dowel rod to make the handle underneath the back shell of the gun. It's for you to hold onto to support the weight of the back of the gun. We'll probably take a picture of it and pop it in here as well if there's not a picture of the control panel already. As to the wire, we honestly don't know how much we used. The little (I call them horse-like) pieces were made before the claws were, so we estimated and surprisingly they were the perfect size. If you want to use your personal judgment on how large they are, i don't think it would be a problem. However, if I had to venture a guess, the longer "horse legs" are approx. 4" and the shorter "legs" are approx. 3". The soldered-in piece connecting them (the "back" of the horse) is approx. .5". I'll be more descriptive in the paragraph, promise! ~ Shell
aburke1 in reply to ThePropNerdsJun 30, 2011. 9:12 PM
Sweet thanks, That would be extremely helpful. Definitely look forward to using this as a guide for when I make mine. Now the hard part, find a location to shot a portal short film. Anyone know if Aperture Science would let me rent out part of there facility to film a short?
squeesa6 says: Jun 30, 2011. 2:49 PM
When I try to download the docx it gets all screwed up. But I did find the picture in the downloaded file. About how big should the circle be in diameter. Just want to be sure the picture is at the right size.Thanks!
ThePropNerds (author) in reply to squeesa6Jun 30, 2011. 8:50 PM
wow, that is tremendously weird. When I try to download it, I get a .tmp file. If you get the .tmp file, just rename the extension to .docx and it'll work. As far as the picture goes, play with the margins so you can expand the image (keeping it in scale) to the side edges of the page. This will allow everything to be in scale. The circle edges are inverted in that image, though -- you cut the inside of the black out, not the outside. It should be 2.5".

~joe
l99roufs says: Jun 30, 2011. 11:09 AM
You got this off of Back yard FX didn't you.
ThePropNerds (author) in reply to l99roufsJun 30, 2011. 1:00 PM
If you had read the comments, you'd've seen that somebody already asked this ^_^

No, we didn't get it off the show. First of all, that show was made long after we did our original research for the gun. Second, even though our gun and his gun use the same reference point (VolpinProps' build, v1), ours is a far better and cleaner design and execution. :)

~joe
Virtual Adept says: Jun 29, 2011. 9:41 AM
This prop looks great! I wish I had a shop to make one in for my Cave Johnson costume.
Virtual Adept says: Jun 29, 2011. 9:16 AM
I just wanted to say that the GLaDOS quote reads an aweful lot like some ISO 9001 compliance procedure documentation I've seen. Spine-chilling.
CazzPhoenix says: Jun 24, 2011. 5:48 AM
Had I seen this a few weeks ago I wouldn't have gotten my refund on the GenCon tickets (wasn't enough egame tourneys for me) just so I could see this in person. Great job!
ThePropNerds (author) in reply to CazzPhoenixJun 24, 2011. 8:06 AM
If I remember correctly, the costume contest takes place outside of the main exhibition hall, which is the only area of the convention you actually need a badge to get into. So if you just want to come and watch, there shouldn't be a problem!
CazzPhoenix in reply to ThePropNerdsJun 27, 2011. 5:02 AM
I did not know that. I've never been to GenCon and have always wanted to check it out so I might at least have to stop by for that :-)
ThePropNerds (author) in reply to CazzPhoenixJun 27, 2011. 8:23 AM
Again, I'm not entirely sure -- I've been for the last 6 years, but only to play and never for the costumes. This is a new experience for me :)
~ joe
SHIFT! says: Jun 20, 2011. 10:19 AM
Love the electronics section! Does the gun also make the Blue/Orange portal firing sounds when shot?
ThePropNerds (author) in reply to SHIFT!Jun 20, 2011. 12:18 PM
haha I wish -- since this was our first build we wanted to keep it relatively simple. Even Mr. Krix didn't attempt adding sound until his sixth ASHPD. ^_^
Azzurrra in reply to ThePropNerdsJun 23, 2011. 9:42 AM
Hahah, second actually. He has only made three. The third made portal sounds and Glados potato sound bites. But you're right, in principle: best to start simple.
ThePropNerds (author) in reply to AzzurrraJun 23, 2011. 11:08 AM
Technically, it was his seventh, now that I think about it (if I read correctly): he posted the first for his wife, Emily, made five to sell (total=6), then made the Child's Play gun (7, the one with sound), then made the potato gun for Valve last (8). However, I could be wrong. :)
Azzurrra in reply to ThePropNerdsJun 23, 2011. 6:27 PM
Technically, I am his wife, Emily. :)
He never made the five he had said he would make, because after he made the 2nd gun for Child's Play, and they had marketed that it would be one of two (one being the gun at auction and the other being the gun sold to Valve, as my gun was somewhat different from those two), they had decided that he would not make any more. He did pull some casts for the casings, but he only ever finished three guns.
That being said, I should have mentioned in my first comment that we both really like your article here, and he will probably include it among his list of resource links when people ask him how to make one.
Cheers!
ThePropNerds (author) in reply to AzzurrraJun 26, 2011. 2:52 PM
*blush* Well, I suppose you would know :D That's what I get for being flippant! Thank you very much for your praise -- it does mean a lot! I assumed that since the comments on your gun's post said things like "4/5 are sold already" that he had simply made them and they had not surfaced in the public eye since then. Thanks for the info :)

Also, we would like to cordially invite you as well as your husband to GenCon and lunch if you happen to be in the greater Indianapolis area around the 6th of August. We'd love to meet you both! Michelle, Jake, and I realize that it's a little bit of a schlep for you to make from GA, but the offer does stand! You can get ahold of us at thepropnerds@gmail.com :)
DrWilliamHorriblePhD says: Jun 23, 2011. 4:03 PM
Any way you could be talked into uploading your blueprints as an example piece?
ThePropNerds (author) in reply to DrWilliamHorriblePhDJun 26, 2011. 1:22 PM
As per the request of my partner, you can find a rather low-res scan of our blueprints as the first image. This is to (hopefully) force you to draw out your own :) Also, you'll see that the front shell is slightly different on the gun as opposed to on the prints -- we went back to the game model and saw halfway through building that our blueprint was incorrect, so we fixed it on the fly using a separate page that now I can't find. If you can (or even want to), I would suggest drafting the front shell after the one on the gun rather than off our blueprint.
robynation says: Jun 25, 2011. 9:25 PM
where's the video?
ThePropNerds (author) in reply to robynationJun 26, 2011. 1:17 PM
First page, bottom of introduction.
Electorials says: Jun 26, 2011. 3:13 AM
That's just Awesome!
108ricky says: Jun 26, 2011. 12:43 AM
Can you at least put a picture of the blueprints?
lint66 says: Jun 24, 2011. 3:53 PM
Quick question. This might have ben mentioned but all together how much do you think this entire project cost, money wise.
ThePropNerds (author) in reply to lint66Jun 24, 2011. 9:20 PM
It was answered earlier in the comments, actually -- we estimate that it cost about $350 in raw materials and several thousand in man-hours.
imuhachev says: Jun 23, 2011. 9:49 AM
video?
ThePropNerds (author) in reply to imuhachevJun 23, 2011. 11:00 PM
Not if you're going to ask like that. :P
futeng in reply to ThePropNerdsJun 23, 2011. 11:48 PM
Will you please make a video? I would like to make this for Halloween and a video would be much appreciated.
ThePropNerds (author) in reply to futengJun 24, 2011. 8:15 PM
Aaaaaaaand it's live on the first page :)
ThePropNerds (author) in reply to futengJun 24, 2011. 7:11 AM
heh, I was planning to throw one together tonight after work anyways :) I'll try to get it posted tonight as well.
~ joe
blkarcher77 says: Jun 24, 2011. 4:48 PM
This dog is awesome
miniclipper says: Jun 24, 2011. 1:58 PM
also needed walls covered in moon dust
eamc317 says: Jun 24, 2011. 12:59 PM
Thanks for sharing. I like it a whole lot! Just finished Portal 2, and I thought it was better than the original. =)
imBobertRobert says: Jun 24, 2011. 11:26 AM
great.. but you forgot glados the potato :)
flame boyyyy says: Jun 23, 2011. 10:54 PM
Looks awesome...idk what itd be used for besides a stage prop...or sumthing.... :D
tbenson2 in reply to flame boyyyyJun 24, 2011. 10:22 AM
Orange and Blue only paintball gun?
dombeef in reply to flame boyyyyJun 24, 2011. 9:11 AM
Halloween idea?
CamWaite says: Jun 24, 2011. 9:23 AM
Ok sorry but in step 1 there is a major error, in test chamber one you are told specifically "Do not look into the active end of the device!" =P

Seriously though kudos for an awesome project =]
dombeef says: Jun 24, 2011. 9:12 AM
How do you hold it? I have been thinking of making one since last halloween, and I dont know how I will hold it or how big it should be. How much does it weight?
monkeys98 says: Jun 24, 2011. 2:34 AM
holy $#!^ this is awesome!!
one project i will never be able to make :-)
baz561 says: Jun 21, 2011. 3:01 PM
That is the most amazing costume prop i have ever seen, and if i had the money and brains to make this i so would give it a shot.
Delo97 in reply to baz561Jun 24, 2011. 2:15 AM
We both just earned the achievement: Too Lazy To Do It; wich provides -15 points!
CODKING says: Jun 23, 2011. 12:17 PM
how much would u sell it for? LOL
ThePropNerds (author) in reply to CODKINGJun 23, 2011. 2:08 PM
We did play around with the idea of selling it after the con in August, but for now, at least, the gun is ours. I think we'll actually end up keeping it -- I'm going to be wiring in a 4.5v wall-wart adapter that will let us use the ASHPD as accent lighting in our dorm room. Perhaps we'll sell the next project we make... ^_^
CODKING in reply to ThePropNerdsJun 23, 2011. 7:58 PM
i figured so. well i was jsut wondering
ThePropNerds (author) in reply to ThePropNerdsJun 23, 2011. 7:13 PM
Correction:
The post above -posted by joe- seems to imply that either I am a guy or that joe and I will be rooming together in the statement "...our dorm room." Let me just say I would personally like to clean up matters by stating that Joe and I have perfectly separated rooms and he, in fact, will be rooming with my boyfriend instead of myself. ;) ...just fyi. Whoo! ...Glad that got cleared up. *grin* ~Shelley
speeddemon92 says: Jun 23, 2011. 4:09 PM
I must say this is a great instructable and I will be doing this soon. The only problem I will have is I can't seem to picture the barrel of how it is assembled or where to find a grating. Is it possible to get a rough blueprint so I will know how to make it?
ThePropNerds (author) in reply to speeddemon92Jun 23, 2011. 7:06 PM
Sorry we didn't take many pictures of the barrel, like we said it was a pretty frustrating piece! (I'm Dawizardi's partner for this, by the way.) But i'm sure I could draw something up and post it in terms of steps and angles. :) ~ Shelley
speeddemon92 in reply to ThePropNerdsJun 23, 2011. 7:46 PM
Thank you! This will help all of us greatly so I can't wait for it! Now I just need to scrounge up some money to get some bondo :D
mr.frob says: Jun 23, 2011. 4:05 PM
Amazing, I love it! Beautiful work!
TheKnotTier says: Jun 20, 2011. 3:20 PM
This Was a Triumph...
CAMM in reply to TheKnotTierJun 23, 2011. 7:35 AM
I'm Making a note here: Huge Success
jsancartier in reply to CAMMJun 23, 2011. 8:59 AM
it's hard to overstate my satisfaction.
The Insignificant User in reply to jsancartierJun 23, 2011. 9:18 AM
Aperture Science: We do what me must, because we can;
For the good of all of us, except the ones who are dead.
marc.2377 in reply to The Insignificant UserJun 23, 2011. 9:33 AM
But there's no sense crying over every mistake.
Kasm279 in reply to marc.2377Jun 23, 2011. 9:52 AM
You just keep trying 'till you run out of cake!
pedrombbm in reply to Kasm279Jun 23, 2011. 10:03 AM
And the Combo gets done.
And you make a neat Break.
For the people who are still alive.
killerdynamo in reply to pedrombbmJun 23, 2011. 10:58 AM
I award you one internet, sir.
speeddemon92 in reply to Kasm279Jun 23, 2011. 10:02 AM
And the Science gets done.
And you make a neat gun.
ralphkidsguns in reply to speeddemon92Jun 23, 2011. 12:06 PM
for the people who are still alive!
Delo97 in reply to ralphkidsgunsJun 24, 2011. 2:19 AM
I'm not even angry,
dombeef in reply to Delo97Jun 24, 2011. 9:13 AM
I'm being so sincere right now.
ralphkidsguns in reply to dombeefJul 4, 2011. 1:43 PM
even though you broke my heart and killed me!
dombeef in reply to ralphkidsgunsJul 4, 2011. 1:48 PM
And tore me to pieces.
ralphkidsguns in reply to dombeefJul 4, 2011. 2:09 PM
and threw every piece into a fire!
dombeef in reply to ralphkidsgunsJul 4, 2011. 2:16 PM
As it burned it hurt because I was so happy for you!
ralphkidsguns in reply to dombeefJul 5, 2011. 12:46 PM
now these points of data make a beautiful line
ThePropNerds (author) in reply to speeddemon92Jun 23, 2011. 11:11 AM
and then you get featured twice, a notice that it's "popular!" and a Pro membership ^_^
astrong0 says: Jun 23, 2011. 9:10 AM
ah i remember the first time i used bondo and thought one drop was enough hardener....(dream sequence sound)
silveravnt says: Jun 23, 2011. 7:51 AM
Wow! This is a spectacular primer on techniques to make just about any prop. Great job.
germanfist says: Jun 22, 2011. 8:11 PM
this is rad... VERY well done.
ninjatesshin says: Jun 20, 2011. 6:35 PM
from indy mogul tv show backyard fx
SP Tutorials in reply to ninjatesshinJun 21, 2011. 1:48 PM
actually it is not. this is made from plastic. the indymogul portal gun looked horrible and was made of foam.
vishalapr in reply to ninjatesshinJun 20, 2011. 10:14 PM
Oh yeah I remember that episode where he makes this!!Its a really cool episode!!!
ThePropNerds (author) in reply to ninjatesshinJun 20, 2011. 8:52 PM
...what? I'm sorry, I don't follow.
Audrey2 in reply to ThePropNerdsJun 21, 2011. 1:53 AM
They had an episode where they made a Portal gun.
Although from a quick look over yours, you do a bit of a better job (they have to be very quick on the show).

Either way, YOU ARE AMAZING!
Props to you for a brilliant prop!

+1 vote in the LED contest! :)
ThePropNerds (author) in reply to Audrey2Jun 21, 2011. 7:27 AM
Huh. I've never heard of this show -- I'll have to look it up. Is this episode recent? It didn't come up when we were doing our research a few months ago ^_^

And thank you very much for the vote! :)
Audrey2 in reply to ThePropNerdsJun 21, 2011. 8:10 AM
It's two weeks old, you can watch it here:
http://www.youtube.com/watch?v=HQFBCH1nno8

:)
Kaptain Kool says: Jun 21, 2011. 4:52 AM
This is amazing!
nicotrial says: Jun 20, 2011. 1:55 PM
WOOOWWW very nice other then my entry this is my favorit!!! i give you my vote!!
ThePropNerds (author) in reply to nicotrialJun 20, 2011. 4:08 PM
Thanks! :)
maximcsauerkraut says: Jun 20, 2011. 1:58 PM
Look's nice
SHIFT! says: Jun 20, 2011. 10:09 AM
GLaDOS approves: "You've saved science!"
splazem says: Jun 20, 2011. 8:43 AM
Wow. This is so awesome!
Burnsides says: Jun 20, 2011. 7:06 AM
Domination. That is what this instructable is.
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