マキシム機関銃
Self-loaders are firearms that use some of the discharge energy to reload the firearm. These are also called semi- or full-automatics. These are typically fed from an underbarrel tube or detachable box "magazine", sometimes inaccurately referred to as a "clip" (which denotes a magazine reloading device used in certain rifles, or a retainer for flangeless bullets used in certain revolvers). The world's first self-loading firearm is the Maxim gun, developed by British inventor Sir Hiram Maxim in 1884, capable of firing 600 rounds per minute but requires a team of men to maintain and is not portable by one man. The Maxim gun has been used in a vast number of conflicts.