The M1918 Browning Automatic Rifle, commonly known as the BAR, is a light machine gun designed by John Browning and adopted by the United States military in 1918. It was primarily used during World War I and World War II, providing infantry units with a portable automatic weapon. The BAR fires .30-06 Springfield cartridges and has a cyclic rate of about 500 to 650 rounds per minute. Weighing around 16.5 pounds, the BAR features a gas-operated mechanism and a 20-round magazine. Its design allowed for both semi-automatic and fully automatic fire, making it versatile for various combat situations. The M1918 played a significant role in enhancing the firepower of American troops during its service.