take note that dangerous device, and destructive device are different classifications. "it must be muzzle loaded, not rifled, and not use any projectile which

take note that dangerous device, and destructive device are different classifications. "it must be muzzle loaded, not rifled, and not use any projectile which is intended to be used as a weapon." compressed gas propulsion is not a firearm, unless it [gas] is produced by combustion or explosion of a chemical [incl. propane. ] magazine or breech loading, rifled barrel, a cartridge holding projectile, and charge as part of design will seal the deal for definition as firearm.