In 1983, the US Marine Corps adopted the M16A2 rifle, and the US Army adopted it in 1986. The M16A2 fires the improved 5.56×45mm (M855/SS109) 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. [21] .

2022年10月1日 · Despite the rifle’s problematic beginning during the Vietnam War, it evolved into a world-class military weapon, and its 5.56mm cartridge has become the NATO standard. This is part III of a three-part series on the evolution of the M16 rifle. See part I and part II.

M16A2只具备半自动和3发点射功能，这迎合了某些美国陆军高级军官的主张。 他们认为3发一组地射击是在节省弹药、提高命中率和增强火力之间一个最合适（不如说是妥协）的解决之道。

1973 Colt AR-15 SP1 rifle with "slab side" lower receiver (lacking raised boss around magazine release button) and original Colt 20-round magazine. M16A1 rifle with forward assist, raised boss around magazine release button and a 30-round magazine.

In the year 1957 The US Army requested the Armalite Division of the Fairchild Aircraft Corp to develop a rifle of .22 caliber, lightweight, select-fire, and capable of penetrating a standard steel helmet at 500 meters.

M16A2只具备半自动和3发点射功能，某些美国陆军高级军官主张，3发一组地射击是在节省弹药、提高命中率和增强火力之间一个最合适（不如说是妥协）的解决之道。

2020年6月2日 · M16 is the U.S. military designation for a family of rifles derived from the ArmaLite AR-15 and further developed by Colt. It is an assault rifle which fires NATO standard 5.56 mm ammunition.

The M16A3 Assault Rifle (Colt 901) is an American assault rifle developed from the M16A2 as a version capable of fully-automatic fire. First model adopted by the US Army, produced from 1963 to 1967. Production model adopted by the US Air Force. Designation of standardized production of the XM16E1, produced from 1967.

2024年5月16日 · M16A3源于海豹队使用的M16A2E3，在外观上几乎与A2无异。 主要区别在于铭文和扳机组，它恢复了A1的扳机组，从而恢复了全自动模式，可以说是A2的全自动版本。 但这款武器仅被海军小批量装备。 M16A4可以说是A2的战术导轨版，因此也被称为M16A4 NWS（模块化武器系统）。 它的主要特征是带有导轨的护木和机匣平顶。 A4的机匣平顶同样可以安装可拆卸提把，因此有些安装了提把和护木片的A4看起来与A2相似。 然而，A4又从A3的全自动模式改回 …

M16A3是 M16A2 的全自动改型，于M16A2刚问世的时候被采购，数量不多，主要用于 美国海军。 它具有Safe-Semi-Auto (S-1-F) 快慢机，就像 M16A1 一样。 关于M16A3的特性至今仍有一些混淆的地方。 它经常被描述成 M16A4 的全自动版本。 M16A3的正式描述说它使用了 M16A4 的 皮卡汀尼导轨，因此上述说法不对。 这种误解最有可能来自于民用枪支制造商给予的A2和A3代号，用来区分具有固定可拆卸携带提把的A2和具有皮卡汀尼导轨的版本。 进入1990年代，由于计划夭 …