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this is a PVC air rifle I made out of PVC plumbing pipe and two ball valves. it can hit up to 750 fps, and the ammo can be fired up to a kilometer away, although i have not tried to shoot further than that :)
the total cost for it was about $40
it uses a twin valve mechanism so it can store up to 12 shots without me having to refill the air in it (done so by a little 12volt air compressor mounted on my back.
it shoots darts, rocks, marbles. pretty much anything you can shove down the barrel.
once it shot though 3 inches of wood with a marble :D
this is the third gun i have made, and the first one that actually fires (lol)
it holds upto 220 psi but i only fill it to about 80.
i am currently making a wooden stock for it.
the total cost for it was about $40
it uses a twin valve mechanism so it can store up to 12 shots without me having to refill the air in it (done so by a little 12volt air compressor mounted on my back.
it shoots darts, rocks, marbles. pretty much anything you can shove down the barrel.
once it shot though 3 inches of wood with a marble :D
this is the third gun i have made, and the first one that actually fires (lol)
it holds upto 220 psi but i only fill it to about 80.
i am currently making a wooden stock for it.
The second shot is about 90% power of the first, but still enough to penetrate through sheet metal, with a metal marble. it decreases from about 90% to 70% in the next shots, but all shots but the last 4 (the gun can usually do 12 at 80psi) can go though sheet metal.
pretty damn powerful, and way more now that I have the mini portable compressor
XD AntomanElven.
http://www.instructables.com/id/Air-Cannon-3/ That is it.