NOT KNOWN FACTS ABOUT COLT 20 UPPER

The contemporary M16/M4 rifle is developed around the thought of modularity. Most of the BCM® flat top rated uppers aspect a USGI style laser etched T-marks to supply addressing for your remounting of tactical accessories which include optics, laser sights, etc.Upgrading or buying a new AR-fifteen? Then the twenty inch AR15 complete upper is a mus