The "CAR-15 Rifle" was already identified by most users as the M16 rifle, and "CAR-15" was similarly associated with the short-barreled Colt Submachine Gun and Commando models. Because of that, the term "CAR-15" has been used to describe any M16-based carbine, even if the particular weapon is not officially named this.

The M16, including all variants, is the most mass produced U.S. military weapon in history with over 8 million weapons manufactured to this date. The M16 possessed several novel features for its time.

而美国空军一直在使用gau-5/a、gau-5a/a和gau-5p，直到1980年代后期至1990年代初期，由于发射m885弹的m16a2开始服役，而且空军的许多gau步枪的枪管也到了使用寿命，因此美国空军开始逐步把现有的gau步枪改进成guu-5/p（注意，这里的p前面有斜杠）。

GUU-5/P卡宾枪是美国空军的制式步枪，主要装备空军的地面作战人员如战斗管制队、伞降救援队等等，以及空军基地里的保安人员。 该枪是由美国空军原装备的GAU-5/A、GAU-5A/A、GAU-5/A/B和GAU-5/P通过更换枪管和其他几个零件改装而成。 美国空军在步枪方面一向比较节约。

The M16 rifle (officially designated Rifle, Caliber 5.56 mm, M16) is a family of assault rifles adapted from the ArmaLite AR-15 rifle for the United States military. The original M16 rifle was a 5.56×45mm automatic rifle with a 20-round magazine.

1982年，两名美国空军cct的学员在进行训练，图中背包上的gau-5a/a的消焰器被更换成普通m16步枪的消焰器。 1978年，两名渡河训练中的空军CCT队员 美国空军的CCT学员在学习维护他们的武器GAU-5A/A，有些枪是安装了M16A1的消焰器

This article describes the many variations of the Colt AR-15 and M16 rifle family of weapons produced by Colt's Manufacturing Company. Weapons patterned on the original ArmaLite AR-15 design have been produced by numerous manufacturers and have been used by nations around the world, some of which created their own variations.

M16步枪是AR-15的发展型，特征包括发射5.56x45mm步枪弹、气吹式自动原理（又称直接导气式或导气管导气式）、拥有多个闭锁凸笋的回转式枪机、分为上下两部的铰接式机匣、等。

2020年1月13日 · 美国的m16步枪“子孙后代”非常多，但是都被m4全部取代 作为成功的枪型之一，M16的衍生枪可谓是多的有些数不过来，尤其是一些民间使用的、以竞技或收藏列为目的变形枪更体现了美国民间枪文化的繁荣。

2011年7月7日 · The GAU-15/A .50 caliber is a crew served, recoil operated, belt fed, air cooled, percussion fired weapon, with a rate of fire of 750 rounds per minute. The only differences between the...