Picture of Collapsible Pocket Crossbow
I got bored one day in school so I took out some pens, scissors, and duct tape and did this in about an hour. This is the first crossbow I've seen that's collapsible.

Step 1: Materials

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To build the crossbow, you need- Supplies- •3 Normal Disposable Pens with tubes •1 or more Pilot G2 ink cartridges (at least one empty) 1 is fine, the others are for ammo. •a couple of rubber bands- you only need one, but you need to see which one fits best. Tools- •Good Scissors (for cutting pen in half) •Hot Glue Gun (recommended)/Super Glue/Duct Tape •Small Scissors/Screwdriver/Drill (something to drill holes in the pen tube with)

Step 2: Cutting The Pens

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So first you need to dismantle all of the disposable pens, and just keep the tubes. You can keep the ink cartridges if you want to use them as ammo later. You are going to cut one of them in half in the middle. Then, take the empty Pilot G2 cartridge and cut it off right under the yellow goo. It gets everywhere so don't cut the part with the goo.

Step 3: Making The Ammo Track

Picture of Making The Ammo Track
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Take one of your pen tubes and cut it lengthwise down to about a centimeter from the end on both sides. SIDES not ends. Then cut away one side to open it to put in ammo.

Step 4: Drilling The Hole

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You are going to take the third (base) disposable pen tube and drill a hole in it wide enough to fit the cut piece of G2 cartridge. It has to be tight enough to hold it in place, but loose enough to pull it out when you want to collapse it. You can use a drill, scissors, a screwdriver or something else sharp.

Step 5: Putting It Together

First, stick the cut piece of G2 cartridge into the hole on the base tube. Next, slide the halved pen tube pieces onto each side. Then, hot glue the ammo track down onto the base tube, about a centimeter from the end with the arms (cut tubes). The track has to be shorter then the tube, so trim it off a little so it has room on both ends. Also, before you move on to the next step, I suggest cutting some off the ends of the arms to make it look better and to make it easier to "string".

Step 6: The Bowstring

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Now you're going to attach the rubber band. You need to put it around the two crossbow arms, either by taping it or cutting slits in the arms to hold it. If you have a long rubber band, it's better to tape it so it makes the band shorter and tighter. If you have a smaller band, you should cut slits/grooves on the ends parallel to the pen tube body to hold it, so it won't snap when you're cocking it.

Step 7: Collapsing And Finishing

Picture of Collapsing And Finishing
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To collapse, simply pull the half pen tubes off the cut G2 cartridge and pull the G2 out of the hole in the base tube to get a slim set of pieces that could fit in a glasses case. I hope you like your new crossbow! It works best if you use Pilot G2 cartridges for ammo, and Bic Round Stic disposable pens. This is my first instructable, so tell me what you think!
wmccormick1 made it!1 month ago
here's mine with a couple mods, got a ton of targets...I mean neices and nefews
ChessAmmo4 months ago
Looks really cool
how do you shoot it?
zephyr141 year ago
What leatherman do u have I wanna get the new wave do u think its a good idea?
daveemajor2 years ago
Can you make a video?
johnyboy1172 years ago
i got the same leatherman
RossTheGreat (author) 2 years ago
No I built this one at home the one I built at school I had to use only those folding scissors.
Wow your school lets you bring multi tools to school! I want to go there!
cdalton42 years ago
I love it awesome
RossTheGreat (author) 2 years ago
I just entered crossbow in Epilog Laser and I doubt I'm gonna win but I'd be freakin excited if I won runner-up.
RossTheGreat (author) 2 years ago
Dan seriously stop spamming comments.
sorry for spamming and being a Dan but top contest?
lol hiz
shut up
RossTheGreat (author) 2 years ago
Dan don't spam comments.
Ross wanna do try to win a contest tell me which one u want to do tomorrow
and u showed it to me so I should know
good job
hi Ross its me Ryan I MEAN DAN!
I'm going to try that!
c3ralki1l3r2 years ago
If i didnt want it collapsible could i not use a g2 pen :P
Great job! Really clean and professional! Perfect for Nerf!

RossTheGreat (author) 2 years ago
dunnos- you have an amazing profile pic. C&H FTW!
RossTheGreat (author) 2 years ago
I don't know how to upload videos. Instructable, anyone?
You can upload it to youtube and use the link to embed it in your instructable.

Nice pen!
dunnos dunnos2 years ago
crossbow* of course... heheh
Ringer16332 years ago
how far does it shoot? You should upload a video.
RossTheGreat (author) 2 years ago
Also- StoryAddict- I'm gonna look at that double-crossbow...
RossTheGreat (author) 2 years ago
Depends on the rubber band. I got around fifteen feet at an angle with a pretty weak one.
i used to make this kind of thing once(i built a self-reloading crossbow based on a museum exhibit i saw(pitt rivers oxford/ipswich natural history)) that is quite a neat design, compact and elegant.but what about power and range?
Recently used on my girlfriend sitting on the first bench in my math class
Recently used on my girlfriend sitting on the first bench in my math class
RossTheGreat (author) 2 years ago
Would you believe me if I told you this was my first instructable?
GDADZGSONS2 years ago
Great job!
Mrdewdew2 years ago
Great! This looks awesome, cant wait to try it!
StoryAddict2 years ago
Great job! Can't wait to build my own. Now if only I could figure out how to build the double-crossbow Gretel wields in "Witch Hunters."
Robin3292 years ago
Your glasses case is cooler than mine D:
RossTheGreat (author) 2 years ago
Thanks. This is what happens when I get bored after tests.
RossTheGreat (author) 2 years ago
Comments and reviews welcome!
ilpug2 years ago
This is one of the cleaner pen shooter builds on the site. Well presented, good directions and pictures, and the final product looks good, as opposed to most of the terrible ones I've seen.

Well done.