M1919A4 on M20 mount and short pedestal (ID 4.09)

The M1919 Browning is a .30 caliber machine gun that was widely used during the 20th century, especially during WW2, the Korean War and the Vietnam War. The M1919 saw service as a light infantry, coaxial, mounted, aircraft and anti-aircraft machine gun by the U.S. and many other countries.

The M1919 was an air-cooled development of the standard US machine gun of the Browning designed water-cooled M1917. The emergence of general purpose machine guns in the 1950s pushed the M1919 into secondary roles in many cases, especially after the arrival of the M60 in US Army service. The US Navy also converted many to 7.62 mm NATO, and designated them Mk 21 Mod 0; they were commonly used on riverine craft in the 1960s and 1970s in Vietnam. Many NATO countries also converted their examples to 7.62 mm caliber, and these remained in service well into the 1990s, as well as up to the present day in some countries.