Tag Archives: automatic

E0989 – M240B Medium Machine Gun

The M240B, is the standard US Marine Corps medium machine gun. The Marine Corps replaced the M60E3 with the M240G and subsequently replaced by the M240B. The ground version of the M240 allows for a common medium machine gun throughout the Marine Corps. The M240B Machine Gun is the ground version of the original M240/M240E1, 7.62mm medium class weapon designed as a coaxial/pintle mounted machine gun for tanks and light armored vehicles. The rate of fire may be controlled by three different regulator settings. The M240G is modified for ground use by the installation of an "infantry modification kit," comprised of a flash suppressor, front sight, carrying handle for the barrel, a buttstock, infantry length pistol grip, bipod, and rear sight assembly.

The M240B is equipped with an integrated optical rail feed cover and a handguard with heat shield to provide thermal protection to the operator.
Manufacturer: Fabrique Nationale Manufacturing, Inc.
Length: 47.5 inches (120.65 centimeters)
Weight: 24.2 pounds (10.99 kilograms)
Bore diameter: 7.62mm (.308 inches)
Maximum effective range: 1.1 miles (1.8 kilometers) on tripod mount
Maximum range: 2.31 miles (3.725 kilometers)
Rates of fire:

  • Cyclic: 650-950 rounds per minute
  • Rapid: 200 rounds per minute
  • Sustained: 100 rounds per minute

Unit Replacement Cost: $6,600

E0980 – M2(A1) .50cal Machine Gun HB

Builder: Saco Defense
Length: 61.42 inches (156 centimeters)
Bore diameter: .50 inches (12.7mm)

  • Gun: 84 pounds (38 kilograms)
  • M3 Tripod (Complete): 44 pounds (19.98 kilograms)
  • Total: 128 pounds (58 kilograms)

Maximum effective range: 2000 meters with tripod mount
Maximum range: 4.22 miles (6.8 kilometers)

Cyclic rate of fire: 550 rounds per minute
Unit Replacement Cost: $14,002
Features: The Browning M2 .50 Caliber Machine Gun, Heavy Barrel is an automatic, recoil operated, air-cooled machine gun with adjustable head-space and is crew transportable with limited amounts of ammunition over short distances. By re-positioning some of the component parts, ammunition may be fed from either the left or right side. A disintegrating metallic link-belt is used to feed the ammunition into the weapon.
This gun is has a back plate with spade grips, trigger, a relatively new safety, and bolt latch release. This gun may be mounted on ground mounts and most vehicles as an anti-personnel and anti-aircraft weapon. The gun is equipped with leaf-type rear sight, flash suppressor and a spare barrel assembly. Associated components are the M63 antiaircraft mount and the M3 tripod mount.
Required: headspace an timing verification before firing.
Background: Numerous manufacturers originally produced the M2 Heavy Machine Gun.
The replacement for the M2, the M2A1, of which the Army is the PICA, no longer requires headspace an timing.

E0960 – M249 Squad Automatic Weapon

Primary function: Hand-held combat machine gun
Manufacturer: Fabrique Nationale Manufacturing, Inc.
Bore diameter: 5.56mm (.233 inches)
Length: 40.87 inches (103.81 centimeters)


  • With bipod and tools: 15.16 pounds (6.88 kilograms)
  • 200-round box magazine: 6.92 pounds (3.14 kilograms)
  • 30-round magazine: 1.07 pounds (.49 kilograms)

Maximum effective range: 3281 feet (1000 meters) for an area target
Maximum range: 2.23 miles (3.6 kilometers)

Rates of fire:

  • Cyclic: 725 rounds per minute
  • Sustained: 85 rounds per minute
  • Unit Replacement Cost: $4,087

Features: The Squad Automatic Weapon (SAW), or 5.56mm M249 is an individually portable, gas operated, magazine or disintegrating metallic link-belt fed, light machine gun with fixed headspace and quick change barrel feature. The M249 engages point targets out to 800 meters, firing the improved NATO standard 5.56mm cartridge.
The SAW forms the basis of firepower for the fire team. The gunner has the option of using 30-round M16 magazines or linked ammunition from pre-loaded 200-round plastic magazines. The gunner's basic load is 600 rounds of linked ammunition.

Background: The SAW was developed through an initially Army-led research and development effort and eventually a Joint NDO program in the late 1970s/early 1980s to restore sustained and accurate automatic weapons fire to the fire team and squad. When actually fielded in the mid-1980s, the SAW was issued as a one-for-one replacement for the designated "automatic rifle" (M16A1) in the Fire Team. In this regard, the SAW filled the void created by the retirement of the Browning Automatic Rifle (BAR) during the 1950s because interim automatic weapons (e.g. M-14E2/M16A1) had failed as viable "base of fire" weapons. Early in the SAW's fielding, the Army identified the need for a Product Improvement Program (PIP) to enhance the weapon. This effort resulted in a "PIP kit" which modifies the barrel, handguard, stock, pistol grip, buffer, and sights.