It is the primary heavy machine gun of NATO countries and has been used by many other countries as well. U.S. forces have used the M2 longer than any other firearm except the .45 ACP M1911 pistol, which was also designed by John Browning.

The quick-change barrel version of the unbeatable M2HB .50 Cal (12.7x99mm) Browning machine gun with new upgrades.

HEAVY MACHINE GUN, .50 CAL, M2HB/QCB OPERATOR’S MANUAL. M2 HB/QCB 1 Warning Hearing protection must be worn when firing this weapon. Headspace should be checked and adjusted before firing weapon, after assembling weapon, and after replacing barrel.

The U.S. Ordnance M2HB is an air-cooled, belt-fed, machine gun that fires from a closed bolt and operates on the short recoil principle. It is capable of both sustained automatic and accurate single-shot fire.

The M2HB fires a variety of NATO .50 Caliber ammuni-tion to include: ball, tracer, armor-piercing, incendiary, and saboted light armor penetrator. The M2HB will deliver lethal effects against multiple target types. The maximum effec-tive range of the M2HB is 1,830 meters for area targets and 1,500 meters for point targets. M2HB.50 CALIBER (12.7MM)

M2重機槍 （M2 Machine Gun），俗稱 五零 ／ 點五零機槍 （英語：.50 Caliber Machine Gun，簡稱：.50 Cal），目前美軍使用型號的官方名稱為 白朗寧M2HB.50口徑機動式機槍 （英語： Browning Machine Gun，Cal. .50， M2HB，Flexible.），是由 約翰·白朗寧 在 一戰 後設計的 重機槍，發射 12.7×99毫米 （.50 BMG）大口徑彈藥。

Aug 10, 2023 · The M2HB's formal designation is "Browning Machine Gun, Caliber .50, M2, HB". The HB model has seen service since 1933. The .50 BMG (12.7x99mm NATO) cartridge has proven useful in the long-range sniper role when utilized in anti-material rifle guises.

The M2HB .50 caliber (12.7x99mm) is an air-cooled, belt-fed, machine gun that fires from a closed bolt, operated on John Browning’s venerable short recoil principle. This weapon system first went into design in the early 1920s, and was in full use by the mid-1930s.

M2HB, Soft Mount (NSN 1005-01-343-0747) "Machine Gun, Cal .50, Browning, M2, Heavy Barrel, Soft Mount". A belt-fed, recoil operated, air-cooled, crew-served machine gun mounted on the U.S. Navy's MK 26 Mod 15, 16, and 17 gun mounts.

In service to this day, the air-cooled M2 HB has been used in a wide spectrum of roles on sea, air and land, from as fundamental as an infantry heavy machine gun, as rarified as the main armament of top of the line fighter aircraft, to as oddball as being used as a sniper rifle; the famed Carlos Hathcock used a scoped M2 to set a confirmed kill ...