Mini Paintball/Airsoft m203

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PVC Arsenal 17
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Very simple cannon

diagram is pretty much all you need to figure it out.

It uses a 3/4" cap as a piston.
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beebs111
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and the point of this gun is?................................ dont shoot it at people, and what diameter pipe is the barrell?
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noname
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You're asking for a barrel collapse if you use thin-walled pipe, but other than that it looks al right. You should try sleeving it in some SCH 80 1."
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PVC Arsenal 17
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the barrel would have been 1/2 sdr 13.5 for paintballs. It is actually rated for 200 psi. I've used it in one coaxial already and it holds up fine.

I decided though to use 1/2 CPVC instead for larger chamber volume.

Basically you just pour in some airsoft bbs and plug it with a circle of cardboard so the bbs stay in while you arent shooting. When one guy has you pinned down on the airsoft field, just pull the pin and shower some bbs on him!
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noname
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Better chrono it first. I brought my PB rifle to a field and the guys said I could use it if it passed the speed test. It shot 455 fps at 40 psi. You shoot someone with 50 airsoft BBs at around that speed and people aren't going to be happy.
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iheartairsoft
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do u have directoins 2 assemble the gun?

please email me at gunmonkey962@aol.com
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drac
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If you can't figure out how to do it, you shouldn't be building them.
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noname
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Yeah, seriously, that thing is like 5 parts.
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iheartairsoft
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i was wonderin about the internals and what kind o vavle setup it had
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noname
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It uses a barrel sealing diaphragm. You can see the actual finished gun <a href="http://www.spudfiles.com/forums/viewtopic.php?t=3480&"> here.</a>
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iheartairsoft
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thx thats all i wanted to kno
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POS
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say, noname, that thing on the back, with the keyring on it, what kind of valve or whatever is that ? Neder seen it before.
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killagorrila99
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Its a safety pop off valve!
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POS
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thx, what is it used for exacly ? I mean, not here like in a gun, but normaly.
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MrCrowley
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well say a 125psi pop off could be used on a boiler or something and incase something went wrong and the pressure built up to 150psi i9nstead of 100psi the valve would release pressure until it comes back under 125
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