What sets the M4 RAS other than other 2-piece quad rails on the market is that it securely locks to the rifle’s barrel nut by means of a clamp and screw arrangement, making it an extremely sound Basis on which to mount tactical accessories. This is called carrier tilt. The https://ras-m497339.livebloggs.com/35735866/what-does-knights-armament-quad-rail-mean