The American Civil War created a variety of these weapons, ranging from so-known as “volley” guns that sprayed many rifle bullets all of sudden similar to a shotgun, to multishot, semi-automatic weapons like the Agar machine gun, which was nicknamed the “coffee grinder” with the way it fed its ammunition. https://machguns.com/product/lot-1452-u-s-auto-ordnance-1928a1-class-iii-nfa-cr-fully-transferable/