Volley gun
The Ribauldequin was a medieval version of the volley gun. It had its barrels set up in parallel. This early version was first employed during the Hundred Years' War by the army of Edward III of England, in 1339. Later on, the late Swiss army employed it.
History of the firearm
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).