What sets the M4 RAS besides other 2-piece quad rails that you can buy is that it securely locks to your rifle’s barrel nut via a clamp and screw arrangement, rendering it an extremely stable foundation upon which to mount tactical equipment. Over time the Maritime Corps did approve using https://simonfscks.azzablog.com/29644364/detailed-notes-on-knights-armament-carbine-length-quad-rail