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A heavy machine gun (HMG) is an automatic weapon of small caliber designed for sustained, rapid fire. Typically belt-fed, HMGs can fire 500 to 1,000 rounds per minute, continuing as long as the trigger is held and ammunition is available.1

Developed in the late 19th century, HMGs have significantly changed modern warfare. Post-1945, the term "heavy machine gun" refers to automatic weapons firing ammunition larger than standard combat rifles, commonly .50 inch or 12.7 mm caliber. These weapons are often gas-operated or recoil-operated and can be mounted on tripods or vehicles for use against ground targets or aircraft. The HMG abbreviation can also stand for Her Majesty's Government or His Majesty's Government.12345

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