M16 rifle
The M16
rifle, officially designated Rifle,
Caliber 5.56 mm, M16, is the United States military select-fire
adaptation of the AR-15rifle. The rifle was
adapted for semi-automatic and
full-automatic fire. Colt purchased
the rights to the AR-15 fromArmaLite, and currently uses that designation only for
semi-automatic versions of the rifle. The M16 fires the 5.56×45mm NATOcartridge.
The rifle entered United States Army service and was deployed for jungle warfare operations in South Vietnam in 1963, becoming the U.S. military's standard service rifle of the Vietnam War by 1969, replacing the M14 rifle in that role. The U.S. Army retained
the M14 in CONUS, Europe, and South Korea until 1970. In 1983 with the USMC's
adoption of the M16A2 (1986 for the US Army), the M16 rifle was modified for
three-round bursts,with some later variants having all modes of fire and has
been the primary service rifle of the U.S. armed forces.
The M16 has also been
widely adopted by other militaries around the world. Total worldwide production
of M16s has been approximately 8 million, making it the most-produced firearm
of its caliber.As of 2010, the U.S. Army is supplementing the M16 in
combat units with the M4 carbine,
which is a smaller version of the M16.
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