M16 Series

The M16 rifle, officially designated Rifle, Caliber 5.56 mm, M16, is a United States military adaptation of the ArmaLite AR-15 rifle.

In 1964, the M16 entered U.S. military service and the following year was deployed for jungle warfare operations during the Vietnam War. In 1969, the M16A1 replaced the M14 rifle to become the U.S. military's standard service rifle. The M16A1 improvements include a bolt-assist, chrome-plated bore and a 30-round magazine.

In 1983, the U.S. Marine Corps adopted the M16A2 rifle and the U.S. Army adopted it in 1986. The M16A2 fires the improved 5.56×45mm NATO cartridge and has a newer adjustable rear sight, case deflector, heavy barrel, improved handguard, pistol grip and buttstock, as well as a semi-auto and three-round burst fire selector. Adopted in 1998, the M16A4 is the fourth generation of the M16 series. It is equipped with a removable carrying handle and Picatinny rail for mounting optics and other ancillary devices.

The M16 had also been widely adopted by other armed forces around the world. Total worldwide production of M16s was approximately 8 million, making it the most-produced firearm of its 5.56 mm caliber. The U.S. military had largely replaced the M16 in combat units with a shorter and lighter version, the M4 carbine.

Variants
The Morrow Project issues the M16A1, M16A2, and M16A3 models of the M16. The M16A2 is represented in the infobox.

M16A1: Remove the 3RB quality.

M16A3: Change the Rate of Fire to 1 and remove the Auto quality.