sentences:  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.The world's first successful self-loading rifle is the Mondragón rifle, designed by Mexican general Manuel Mondragón and was the first self-loading firearm able to be operated by a single rifleman, since its debut in 1908 it received few modifications (bipod, 30-round drum magazine) and has been used during the Mexican Revolution (Mexican Army) and World War I (Imperial German Flying Corps).