The gun adopts the working principle of short recoil barrel and the locking structure of clamping iron lifting. When shooting, the warhead is along the barrel.
The ammunition used by the M2 machine gun moves forward. Under the pressure of gunpowder gas in the bore, the barrel and bolt recoil at the same time. After the bullet flies out of the muzzle, the locking iron leaves the locking bearing surface on the wedge bolt, and the pin shafts on both sides of the locking iron are pressed down by the unlocking inclined surface on the shaping plate, so that the whole locking iron leaves the locking groove below the bolt, and the bolt is unlocked. Subsequently, the barrel socket slammed into the hook accelerator, and the upper end of the accelerator bumped into the tail of the bolt, accelerating the recoil of the bolt. The gun is equipped with a hydraulic buffer device. When the barrel and sleeve recoil, the piston of the hydraulic buffer is pushed backward, which compresses the oil in the buffer tube and makes it escape forward from the gap on the inner wall of the oil pipe around the piston, thus buffering the recoil. When the bolt machine re-enters, the protrusion at the tail of the bolt machine hits the upper end of the accelerator to make it rotate forward, and the accelerator releases the hydraulic buffer spring to push the barrel and socket back. Under the action of the locking inclined plane on the wedge bolt, the locking clamp iron is forced to lift and enter the locking groove under the bolt to lock the bolt.
The gun adopts one-way and two-way ammunition feeding mechanisms, and the guide post at the end of the ammunition pull rod is clamped into the arc groove at the top of the bolt, thus realizing the ammunition feeding action when the bolt reciprocates.
The gun adopts a simple sheet sight and a vertical frame scale, both of which are placed on the shell.
Color development method
Germany developed 13mm anti-tank machine gun in 19 18, and the US troops stationed in France urgently need similar weapons. Winchester developed a 0.50-inch bullet, and Browning enlarged his M 19 17 machine gun.
M2 was originally a water-cooled air defense machine gun, and its air-cooled type was developed in 1930s to equip tanks. The gun uses a heavy barrel to dissipate heat, so it is called HB, which means heavy barrel.
About 3 million guns are made by different companies and equipped in almost all armed forces except the former socialist countries.
In the 1980s, the model of quick barrel replacement was popularized, which avoided the complicated adjustment after barrel replacement or weapon scrubbing.
service condition
American M2HB machine gun is one of the most famous large caliber machine guns in the world. At present, it is equipped in more than 50 countries and used in most western countries.
In addition to M2HB machine guns with tripods, the US Army also equipped them on light jeeps and infantry fighting vehicles as ground support weapons, and also used them as parallel machine guns on tanks.
Model evolution
There are a large number of derivatives of M2 serving in the US military. The US military is identified by different names, and other countries have similar classifications.
Browning M 192 1 water-cooled machine gun is also called M2, which is the so-called Browning machine gun, Cal...50, M2, which is water-cooled and flexible, but Browning M2 has no water-cooled model.
Heavy-duty tubular air-cooled M2 can be divided into three sub-categories:
Infantry type-Browning machine gun, cal..50, m2, HB, flexible type, infantry version-Browning machine gun, cal..50, m2, HB, fixed, installed on the storage tank.
Turret type-Browning machine gun, CAL..50, M2, HB, turret, version installed on tank turret.
The above version, named An /M2, is also used in airplanes and helicopters.
M2 is often used as a remote-controlled fixed weapon on aircraft or aviation machine guns, also known as An /M2 (with the same caliber of .30 and .50 respectively). The remote control M2 is triggered by an electronic or wired trigger. M2 on the plane uses a light gun barrel to absorb the wind during flight, so as to achieve the effect of heat dissipation. The official name of the US military is Browning machine gun, airplane, Cal...50, M2, and a fixed version of the nose is added. The air gun model of the unit is called flexible. M2 13 is a modern model of An /M2, which is installed on the helicopter door.
GAU- 15/A belongs to M2 series, and GAU- 16/A is an improved version of GAU- 15/A, which improves the grip and sight. GAU- 18/A(XM2 18) is a light model of the United States air force in cooperation with M2/M3, which is installed on MH-53 JPA veloii and HH-60 helicopters. GAU- 18/A does not use heavy barrel, and the cartridge case is supplied on the left side and discharged on the right side. GAU- 18/A is equipped with a soft chute and a magazine. The magazine chain enters the shell casing through the chute, and the magazine and chute can carry 1700 rounds of ammunition at most.
M3 is a special long-range shooting version of M2, and its firing rate is higher than M2. M3 can be divided into two modes. One is a long-range shooting model named FN M3P, which is used in The Avengers air defense system. The other model is M3M fixed machine gun, named GAU-2 1/A by the US Air Force and Navy, which is installed on helicopters.
M296 is an improved M2/M3 remote control machine gun, which is generally used in helicopter weapon systems, such as OH-58 helicopter. M296 is different from other remote ignition M2, so it can't be single-fired.
The M2 E-50 is a long-term upgrade plan in practice, which mainly includes the installation of QCB, tactical guide rail, flame arrester and manual safety system on the M2 which is served by infantry and US troops. After that, the newly manufactured M2 heavy machine gun will also adopt M2 E-50 as the production standard.
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