We used to make them out of beer cans and use lighter fluid for propellant.
I think Chuck is still in CA, and this state, in its infinite wisdom, has made it a crime to use a combustion-propelled spud gun. Compressed air is OK, but the old school hairspray guns have disappeared.
I used to hunt at a duck club that had the occasional poacher problem. We had a barn up on a hill, from which we could see most of our hundreds of acres of ponds after the leaves fell off the trees. The Saturday afternoon poachers would sometimes find themselves bombarded by flying potatoes, launched quietly from an ABS pipe fueled by hairspray.
