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勃朗宁M2重机枪是世界上最著名的大口径机枪之一,其前身是1921年定型的M1921 12.7mm重机枪,由约翰·摩西·勃朗宁设计。M1921是勃朗宁M1917 7.62mm重机枪的放大版,同样采用水冷式枪管。1932年,美军为M1921重机枪换装质量较轻的气冷式枪管,改进后命名为M2重机枪。1933年,为解决枪管容易过热的问题,美军装备了采用重型枪管的型号,称为M2HB重机枪。1980年代,勃朗宁公司又在M2HB基础上开发出了可快速更换枪管的M2HB-QCB重机枪。此外,M2还有车载、艇载及机载等型号,形成一个庞大家族。目前,M2系列重机枪已被全世界50多个国家采用,并且至今还活跃在伊拉克和阿富汗战场上。M2重机枪采用枪管短后坐式自动原理,卡铁起落式闭锁结构,发射12.7×99mm(0.50英寸BMG)机枪弹。其主要作为支援武器使用,用于攻击轻装甲目标和集团有生目标。
The Browning M2 heavy machine gun is one of the most famous large-caliber machine guns in the world. Its predecessor was the 1921 M1921 12.7mm heavy machine gun, designed by John Moses Browning. M1921 is a larger version of the Browning M1917 7.62mm heavy machine gun, also using water-cooled barrel. In 1932, the United States military M1921 heavy machine gun dress lighter air-cooled barrel, improved named M2 heavy machine gun. In 1933, in order to solve the problem of overheating of the barrel, the U.S. military equipped a model with a heavy barrel called the M2HB heavy machine gun. In the 1980s, Browning again developed the M2HB-QCB heavy machine gun which can quickly change the barrel on the basis of M2HB. In addition, M2 there are car, boat and airborne and other models, forming a large family. At present, the M2 series of heavy machine guns have been adopted by more than 50 countries in the world and are still active in the battlefields of Iraq and Afghanistan. M2 heavy machine gun with a barrel short recoil automatic principle, card iron landing lock structure, fired 12.7 × 99mm (0.50 inch BMG) machine gun. It is mainly used as a support weapon for attacking light armor targets and the Group has a living goal.