-- Posted by gunnut on 10:52 am on April 7, 2002 BB zipgun: a party popper using straw as barrel shoots 6mm BB, recent power test shows a BB is able to shoot through 1 and 1/2 coke can, 3 layers of alluminium pierced, and one left with a cracked hole, with BB unable to penatrate.... Note: this weapon is very compact, and can be consealed easily in pocket, it is just about 3/4 of a pen.... Ideal PDW, a test also showed that a lobster is killed with the BB pierced one inc deep into it's head. shot fired at 1 metre range.... -- Posted by paladinpress on 12:45 pm on April 7, 2002 possible but Gas leak should be your main concer sense you are working with such a small amount of POTENTIONAL ENERGY to begin with but if you can kepp the leaks out and the barrell stiff in theory I would Guess-ta-mate fps to be about 30 maybe 40 remeber the size of you projectile and the dia of your barrell. I could go on but the idea is just cooky and I like it -- Posted by balor on 2:33 pm on April 7, 2002 This has been discussed before.What most people felt was that if it is only effective at 1 meter then why use it at all.why not use a knife,spike or something similiar that can be used a number of times and doesnt have to be reloaded.     http://www.bombshock.com