Jelly Bean Rifle vs. Piggy Bank

This was the first test of our Pneumatic Jelly Bean Rifle. It consists of a plastic air cylinder connected to a long aluminum barrel. To fire it, we dropped an 18-pound bowling ball from a height of 10 feet directly on the air piston. We plan to refine the design a bit further, but for this first test we achieved a muzzle velocity of 350 feet/second. Definitely fast enough to be lethal!