The pump and spring ball valve are taken from the max d 2000. It works well enough, although the pump is kind of slow, and one of the ball valves had its expansion springs break (but i had gotten 2 for $5 a long time ago from target. I saw 1 for $5 there recently). The bladder is from another gun.
This picture kind of sucks, it's supposed to be a segment of pvc with some tape covering the end. You poke a hole (needle size is fine; high pressure stretches the hole larger) in it, which serves to keep air from going in too fast. The pvc segment goes between the compression couplings, with the taped side closer to the bladder/pump to allow an air reservoir.
It does well at high pressure, judging from the hiss, although it takes a bit longer to refill at low pressure. It refills fast enough for hand reloading, although i think at high pressure you can use it with a clip as a crude semi auto weapon (unfortunately i have neither the tools, supplies, nor the competence to build a clip).
I made the barrel short because i nerf indoors, and plus people i play with would get mad if it were more powerful anyways. It's not straight because i suck at gluing.
edit: I guess i should follow the example of not posting ranges.
Has anyone tried something like this before? I would assume yes because it's so simple, but I havent seen anything about it.
Edited by pwnchu, 10 April 2008 - 06:40 PM.