Magazine capacity: 30 rounds
Weight without magazine: 7.5 lbs.
Overall length: 39.6 in.
Barrel Length: 20 in.
Method of operation: gas
Muzzle velocity (M855/SS109): 3,100 ft/sec
Maximum range (M855/SS109): 3,600 meters
The development of the M16A2 rifle was originally requested by the United States Marine Corps as a result of the USMC's combat experiences in Vietnam with the M16 and M16A1. The Marines were the first branch of the US Armed Forces to adopt the M16A2 in the early/mid 1980s with the United States Army following suit in adopting the M16A2 in the late 1980s.
Weight 8.5 lb (3.9 kg)
Length 39.5 in (1,003 mm)
Barrel length 20 in (508 mm)
Cartridge 5.56x45mm NATO
Action Gas-operated, rotating bolt
Rate of fire 800-900 rounds/min, cyclic depending on model
Muzzle velocity 3,200 ft/s (975 m/s) (M16A1) 3,050 ft/s (930 m/s) (M16A2)
Effective range 550 m (600 yd)
The M-16A2 has been replaced my the M-16A4.
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)
Maximum effective range: 3281 feet (1000 meters) for an area target
Maximum range: 2.23 miles (3.6 kilometers)
Rates of fire:
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.