Instructables

Homemade 500 fps CO2 Airsoft Gun

Step 1: What You'll Need

 You will need
1. A co2 bike tire inflator that has a valve so it doesn't let the co2 out when you screw the top on like some
2. A bic pen
3. Co2 for the inflator
4. Airsoft BBs
5. Electrical tape
you can buy a co2 bike inflator here
www.amazon.com/Planet-Bike-Kiss-Tire-Inflator/dp/B000IQEAMA/ref=acc_glance_sg_ai_-1_5_tit

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faded194511 months ago
Does it use an entire cartridge each shot?
ebaneser1 year ago
Oh yeah I also Know how to make the co2 cartridge reusable. I may post my modded version as an instructable
ebaneser1 year ago
The mag has to be airtight or else the gun will have only half the power.
SAWAirsoft1 year ago
You may also use a broken gas magazine by removine the output valve and nozzle and connect a psi rated hoze.
rwaldrop3 years ago
where did you find the tire intlator
Bike shop. Not walmart if you buy bikes there.
cam.dav323 years ago
Nice work, if you use some simple epoxy glue and a copper 6mm tee joint you can make this automatic, and if you added some decor to it to you could make it look like a proper badass gun.
you'v got a great idea there and I might try it myself, thanks for the inspiration
ilpug3 years ago
I was inspired by this project and started looking for one of these tier inflater things to fit my needs. However, the only ones i found said they needed threaded cartridges to work. does yours use threaded cartridges? It would be a lot more convenient if i could use standard twelve gram cartridges in one of these, so i dont have to spend extra time and money trying to get new threaded cartridges.
tjmortenson (author)  ilpug3 years ago
Hi Ilpug, My tire inflater uses standard 12 gram c02 cartridges like the ones you can buy for a paintball or airsoft gun. Here is a link to one on Amazon.com that can use the standard 12 gram one, or 16 gram threaded or non-threaded.
Hope this helps.

~Tjmortenson
http://www.amazon.com/Genuine-Innovations-Cycling-Motorpump-Ultralfate/dp/B000LCB650/ref=sr_1_46?s=sporting-goods&ie=UTF8&qid=1303174336&sr=1-46


^^ thats the one i am looking at for now, because it can use a wide range of cartridges. I am planning on making some kind of Airsoft sniper system based on this, or maybe a submachine gun, depending on how this gizmo works. than you for the instructable. it is simple. but inspires me to make so much. if i do make a gun based on this system, and i make an instructable, i will be sure to mention you.
ilpug3 years ago
does this empty the co2 cannister in one shot?
tjmortenson (author)  ilpug3 years ago
Hi, No it doesn't empty it it but you have to hit the top fast with your palm or else it might.
X3R01174 years ago
yo man, this is a really good idea. the thing is, i tried devising a magazine for this thing, and it actually works to. you just need to drill hole near the base of the barrel, then get a Bic pen, empty it out, put a spring in it, and you have a good magazine. just really hard to attach. I've been using duct tape up until now, but how can i make it so that it's easier to attach? with regards, please answer back
tjmortenson (author)  X3R01174 years ago
 You could use epoxy to hold it on
yeah, but then how would i get it back out so that i can reload?
take a pen cap, cut off the top, and glue it on with the top on the barrel. that way you can just switch out mags as easy as putting a cap on a pen.
you can use a copper pipe fitting "t"
Hey, this really gave me some hope for my new project. I will be using lightweight metal or carbon fibre 6mm barrel attacheted to the insides of a paintball gun I bought for only €60 in meorca, its a gd one because it actually uses to standard co2 cartrages nt to gd for paintball but very good for bb guns, hopefully it will hit 1000 FPS with two co2 carts. Any ideas please send me them.
pleas tell me if you hit the speed og sound:) . i have been trying for a long time! and my softgun is about 900 fps
tjmortenson (author)  christopher3383 years ago
Maybe you could make an adapter if the barrel on you paintball gun unscrews, then if you could find the right adapter for the barrel to screw in, it would probably work. Then you could make a hopper that fits on the barrel.
acetomato3 years ago
if you put hole on back instead of on top(http://www.youtube.com/watch?v=d61-29U9rJ4)
migel3 years ago
fun project, check out this video i made

http://www.youtube.com/watch?v=TlYkZ_66Gsg
Very Nice Indeed. A bit on the bulky side but very powerful, Nicely done :D
is it really 500 fps?
I meant just kidding as in I'm not ticked off at you, but you did steal my idea. :)
You! Stole! My! Idea! Just kidding... Congrats on putting it up before me. I was thinking you could add a magazine or hopper type thing to make it automatic. Also, if you have a trigger operated co2 inflator, it would be more realistic. Well, great minds think alike. Cheers!
i think i will make this but mine will fire darts! :)
it is a great idea but if you put more than one bb in the barrel you have a shotgun
marffy4 years ago
 have you tryed setting up a magazine 4 it?
tjmortenson (author)  marffy4 years ago
 Sorry it took so long to reply but yes I have.  It was just a pen on it so the bbs would just fall through.
yeah that is what i was thinking about doing. Did it work?
CO2man4 years ago
Hi, this sounds really great, but i wanted to ask if there is a way to make the tire inflator by myself? Because they are quite expensive and i am sure there is some alternative way so could anyone at least briefly try to explain it to me? Thanks very much! And really great instructable!!
tjmortenson (author)  CO2man4 years ago
 I don't think you would want to make one because co2 is so high pressure but you could maybe try to make something like a 3-4 inch piece of high pressure pvc and put a cap with a tire valve on one end and a ball valve on the other and somehow get 6mm tubing on the ball valve.
Ok i will rather not make one xD. But i still have a question and that is how much liters of CO2  is in one CO2 cartridge(i dono the weight's exactly maybe the 16g one?) Thanks for your reply. And for how much shot's does it last?
tjmortenson (author)  Honzik4 years ago
 I don't know how many liters but you only get about 25-40 shots depending on how long you hold the trigger thing down.
Ok thanks, i will try my best to make mine one good :-). Cya
will this actually be 500 fps (or sumthin around it)? PLS REPLY
tjmortenson (author)  firefighter13334 years ago
Sorry it took so long 2 reply but when i tested it i got exactly 500 fps. 
wow that's pretty amasing, i wonder what fps it would have with a breech, btw i saw the price for a co2 inflator, and it was very expensive (i can't order online :( ) it was 25 euro's! i can buy a fully auto pistol or even a shotgun for that money! so yeah,...
lil jon1684 years ago
it needs to shoot metal bbs
or pellets
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