M16A3
M16A3 Caliber: 5.56×45mm M855 The M16A3 is a fully automatic derivative of the M16A2, so its trigger group is the same as that of the M16A1. Other than that, the M16A3 and M16A2 have no differences in appearance. However, in recent years, there has been much confusion about the M16A3, with many people believing it to be a flat-top receiver version of the M16A2. This misconception has been fueled by its appearance in video games and simulation toys. The similarity in appearance between the M16A3 and the M16A2 has led to confusion, compounded by the fact that the M16A3 is primarily used by the Navy for shipboard security and is rarely seen in combat, leading to limited awareness of it. Additionally, Colt once marketed a commercial version of the M16A3 with a flat-top receiver, adding to the confusion. In the early 1990s, Colt's ACR prototype was initially considered as a candidate for the M16A3. By the mid-1990s, with the cancellation of the ACR program and the military's prefe...