Combustion Airsoft Pistol

[Gun Freak]

Never posted a combustion in the showcase, so I decided to share one of my minis. It is a thin walled 1/2 chamber and a bic pen tube barrel for airsoft bb's. Sparker is from a lighter. I finally got it to work with the electrical tape and grip glued on. I use axe spray for fuel. Pistol grip is from an old airsoft gun. It looks nice with paint. I want to add a small air pump to mix the fuel with air easier and vent it. Any ideas for that? As for the damage, it can get through a few layers of paper with ease but not cardboard. It is also very accurate, and very easy to aim. I am going to add some sights, since I can hit a mailbox from about 15 yards. Here's some pics:

[chinnerz]

that pezzo looks hzrd to press (being in an odd pozy) but looks decent. Waiting to see damage vid

[reedfe]

luke, i got a barrel i can get to you when i see you next

[Gun Freak]

Alright reed I might put it on my bbmg.
@chinnerz it isnt really that hard, plus the handle makes it a nice grip so it is all good. I dont know about a vid, its nothing special. Can get through a few layers of paper with ease but not cardboard.

[clemsonguy1125]

What about a basketball pump, if that's to big remember my ideology for a chapstick tube pumpNP

[chinnerz]

so its like a weak air soft gun?? well i'll give you points for trying

[Gun Freak]

Clemsonguy I never understood how it worked, what do you use for the shaft? I have a chapstick tube but I dont want to ruin it for nothing.

[clemsonguy1125]

Ok, google chapstick pop gun and make that, I won't explain since there's hundreds of videos about it, then pull back the shaft and drill an hole rightin front of the piston.

[Gun Freak]

Ok I'll look.

[clemsonguy1125]

Cool, I've never tested it but it should help suck out old air and bring in new

[jor2daje]

This is a lot like my first combustion. I added a bike pump, it doesnt suck out old air thats not how a pump works but it does pump new air in and push old air out. But I would recommend putting a little fan in it its easier and it helps mix.

[clemsonguy1125]

Well my chapsticknisnt really a pump since it doesn't have a 1 way valve, it just removes old air and brings in new air, I don't know what to call it

[jor2daje]

well if theres no oneway valve its just a like a pneumatic cyinder, you wouldnt bring any new oxygen just move the air inside the gun back and forth.

[theBOOM]

I'll suggest you trying to meter butane with it, it'll probably make it 30% more powerful, it shouldn't be hard at all. Also if you want a pump you could put a small syringe, connect to your chamber for pumping, and simply add a valve between the chamber and the syringe so it can be closed off/on before and after firing.

If you don't feel like measuring your chamber volume and calculating the amount of butane required you can simply connect a little butane cartridge found in lighters to your gun. Then count 1 potato 2 potato 3 potato, until you can find the sweet spot for your gun.

[urgle the danish cow]

nice job. i made a combustion airsoft pistol of similar design i look just like a japanese nambu. it was BA and i put an ouret barrel on it for loks but that ended up making it silent .............