like the title says, i was talking to a buddy yesterday who works part time in a machine shop (you can tell where this is going

) he says he is allowed to use the equipment after hours or what not, we got to talking about what to create, a series of 50 or so loud bangs bounced through my head, but they were chased off by thoughts of a decade in a cage. so we were thinking on an all metal, probably aluminum bbmg capable of being safely ran on considerable amounts of regulated co2, since we found a rather large co2 tank with regulator in his dad's barn

... you don't have to spoon feed me, but i can't seem to think of any designs for this since obviously i have only used what a hardware store can supply me with, any ideas would be much appretiated!::worthy::