Description

The Browning machine gun caliber .50 HB, M2 (Figure 1-2) is a belt-fed, recoil-operated, air-cooled, crew-served machine gun. The gun is capable of single shot, as well as automatic fire, and operates on the short recoil principle.

RECEIVER BARREL GROUP

BARREL SUPPORT

RECEIVER BARREL GROUP

BARREL SUPPORT

Figure 1-2. Browning machine gun.

a. The machine gun is capable of being fed from either the right or left by repositioning certain parts. The weapon has nonfixed headspace that must be set. Timing must also be adjusted to cause the gun to fire slightly out of battery to prevent damage to moving parts. The force for recoil operation is furnished by expanding powder gases, which are controlled by various springs, cams, and levers. Maximum surface of the barrel and receiver are exposed to permit air cooling. Perforations in the barrel support allow air to circulate around the breach end of the barrel and help in cooling the parts. A heavy barrel is used to retard early overheating.

b. The gun has a leaf-type rear sight (Figure 1-3), graduated in both yards and roils. The scale ranges from 100 to 2,600 in yards, and from 0 to 62 in mils. The windage knob-permits deflection changes to right or left of center. The front sight is a fixed blade type with cover (Figure 1-4).

Figure 1-3. Leaf type rear sight.
Figure 1-4. Front sight, cover, and blade.

c. Table 1-1 provides the general data on the caliber .50 MG,

Weight (approx)

Weight of barrel

Length of barrel

45 inches

Length of rifling (approx)

41.88 inches

Number of lands and grooves

Twist, right-hand

Feed

link-belt

Muzzle velocity (approx)

Rate of fire (cyclic)

Maximum range (approx)

Maximum effective range (approx)

Area targets

Point targets

Single shot

Table 1-1. General data.

Table 1-1. General data.

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