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 ...

Internally, these rifles may have been known as the M16A2E1 or M16A2E3. The M16A2E1 replaced the fixed iron sights of the standard M16A2 with folding variants.

Added M16A2E3 with ACOG. Added Type-56; Chinese version of AK by M111. Added MD63, romanian AKM variant by M111. Added M4 with Mepro Classic sight by M111. Updated UGL/AGL by increasing its accuracy.