I'm curious if it's possible to take some kind of paintball gun and make it lethal, comparable to a .45 AUTO round in force. this is just for curiosity sake, I would enjoy taking something like that to the range and showing of to people there. I like firearms too, but am interested in a gun that uses compressed air rather than an explosive charge to propel a projectile. Has anyone done this? What I have guessed at so far is that maybe you can revalve a quality paintball gun, maybe increase pressure or size of the air tank... I'm not sure tho. I wouldn't even know what paintball gun would be the best to use. Some might be more modifiable in this manner than others. I'm not a paintball guy so I don't really know. Basically I want a pnumatic gunthat rivals a firearm of similar overall dimentions. Right now I'm thinking a rifle/carbine size, which most the paintball guns I see happen to be. Either gravity fed from canister or fed from a springloaded tube-style clip. I want to be able to use something like a ball bearing for the projectile. I would also like to be able to get many many shots out of the air canister, to negate the difficulties with refilling air tanks as opposed to simply changing the clip on a firearm. Also any info on really really small air compressors would be nice, as an option to refill on the spot. The ideal pnumatic ball bearing gun is not far off from a paintball gun, in that it can support a hundred or hundreds of shots from one bottle, flies at lethal speeds, and has the force of a sizeable firearm. Is this doable?