The M2HB 12.7mm large-caliber machine gun invented by John M Browning first became a standard weapon of the U.S. military in 1920. Since then, it has been in service for more than 100 years and is still widely used in actual combat. Because the M2HB heavy machine gun is highly respected in the U.S. military, it is affectionately called "Ma Deuce" by soldiers.The M2HB 12.7mm large-caliber machine gun is actually an expansion of the Browning M1917A1 and M1919A4 machine guns. The size has been expanded, but the structure is roughly the same as the previous two. In World War II, the M2HB 12.7mm large-caliber machine gun performed very well, fully proving its ability.