1919A4 machinegun history
the end of the First World War and at the time of the development
of tanks, the U.S. military have noticed that the water-cooled
machine guns, including the M1917A1, took too much space in armored
vehicles. The crisis in Europe still increasing the U.S. Ordnance
Department was responsible for developing an air-cooled machine
gun for infantry.
Thus, the 1919A4 Browning machine gun was born, developed by engineer
John Browning, caliber 7.62 mm (.30) and it had a fire power similar
to the water-cooled M1917A1.
machine gun is usually nicknamed "30 Cal".