Colt didn’t go crazy with its ACR entry which ... less accuracy at ranges beyond 300 meters than the standard M16A2. The AAI ACR looks somewhat traditional but is quite different from most.

Here’s What You Need To Remember: The combination of the Army’s dissatisfaction with the M16A2’s default sighting arrangement and the benefits of a lower optic mount lead the Army and Colt..

A shortened variant of the M16A2 rifle, the M4 carbine provides the individual soldier operating in close quarters the capability to engage targets at extended range with accurate, lethal fire.