WHAT DOES COLT 20 INCH CLASSIC UPPER MEAN?

The present-day M16/M4 rifle is developed around the principle of modularity. Each of the BCM® flat major uppers attribute a USGI style laser etched T-marks to deliver addressing for your remounting of tactical equipment including optics, laser sights, etc.That's my standard luck. No income when a thing I want is for sale rather than for sale when