INDICATORS ON COLT 20 INCH BARREL YOU SHOULD KNOW

The present-day M16/M4 rifle is constructed around the idea of modularity. Most of the BCM® flat top uppers characteristic a USGI style laser etched T-marks to provide addressing with the remounting of tactical accessories including optics, laser sights, and many others.Upgrading or purchasing a new AR-15? Then the 20 inch AR15 complete upper is e