Yeah I remember reading a thread saying that lower chamber volume and higher PSI is either better or just as good. I'll look into a high pressure track pump around, thanks for the help!

Whoa! great setup!

I use these 2 links for my pipe concerns:

http://www.gizmology.net/pipe.htm
for some dimensions

and

http://www.copper.org/applications/plum ... table.html

dimensions, burst pressures, all that good stuff.


So you'd want Table 5
Hope I helped

Thanks for all the comments.

Lockednloaded:
Thanks for the advice, I'll get to work on all of it now. Solid scope mount as in a hose clamp?

MrCrowley
The chamber is already 2" by 10", what would be the benefit of having it out of Iron rather than PVC? the pressure it can go to... but all I ...

Search Punkin Chunkin on youtube

That's what I thought, thank you very much.

You like those cheesy Sci-Fi movies where the bad guy names his devious contraption some corny name? Well... this isn't Sci-Fi but this is pretty cheesy. Meet the:
Battle Exhaust Air Releaser :D (and 667 because it's not quite the beast, but the neighbor of the beast. w00t Iron Maiden \m/:twisted ...

is there a notable difference between using air regular air and propane?

propane for pneumatic? hybrid?

Regulator setups seem expensive and pumps are too. I wanted to try c02 or some paintball canisters but they were too expensive for what they offer. I'll get quite a bit of money on by birthday, then I'll be looking more into compressors and regulator setups

alright sounds easy enough. i would try to make a semi QEV gun, but I'd need pretty high pressures for that. I can only get to 120 with my current pump, and a shock pump will only give me 2 or 3 shots, after all that pumping.
I'll just stick to the 1 shot for now.

Yeah I always leave the factory cut end on one side of the pipe in case I ever have to use that end as the barrel sealing side. But I'll remember sandpaper for the future. Have any of you made Copper coaxs yet? is it a bit(if any) harder than PVC?

Alright that should really help then.
Thanks for the suggestions and help, wouldn't get this far without it.
I already have parts for a fullmetal 1 shot 3/4" QEV gun shipping in, so I'll start this coax after that's done and played with. I just wanted a gun that I can play around with and be sure it ...

Thanks :D
It's not serviceable if I were to solvent weld all the pvc parts to each other, but I could solvent weld the barrel inside the 2" to 1/2" reducer to the left, and bolt /screw the chamber 2" pipe to the reducer so it were serviceable. Might be leaky though. I do have a spare QEV laying ...

so a flat sealing face is that important, huh? I'll make sure to sand mine down very flat and smooth and have neoprene on the piston.

How's this for a first design?
1/2" inch barrel inside 2" pipe. Kept in place by 2 2" to 1/2" reducers, with a 1/2" tee at the end for a 1/8" schrader and 1/4 ...

Okay understood.
Thanks a lot for the help, Poland