The hopper process was changed via the belt-fed procedure, which assists control the ammunition's movement to the gun. Ammunition is contained on an extended belt, which the operator holds, or is contained inside of a bag or box. After a round is fired, it moves out of how, as well https://machguns.com/product/lot-1442-hr-model-50-reising-class-iii-nfa-cr-fully-transferable/