To operate the gun, you turn a crank, which revolves the barrels In the cylinder. Just about every barrel passes less than an ammunition hopper, or carousel magazine, since it reaches the very best on the cylinder. A completely new cartridge falls to the breech as well as barrel is https://machguns.com/product/lot-1450-auto-ordnance-a-range-1928-thompson-class-iii-nfa/