Pump action is a type of firearm mechanism commonly used in shotguns. It operates by manually sliding a fore-end grip back and forth, which ejects the spent shell and chambers a new round. This action allows for quick follow-up shots, making it popular for hunting and home defense. The design of pump action firearms is straightforward, making them easy to use and maintain. They typically hold multiple rounds in a magazine tube beneath the barrel. This mechanism is distinct from other types, such as semi-automatic or bolt-action firearms, which operate differently in loading and firing ammunition.