What sets the M4 RAS other than other 2-piece quad rails out there is the fact it securely locks for the rifle’s barrel nut by means of a clamp and screw arrangement, making it a really good foundation on which to mount tactical accessories. The many benefits of these changes, https://franciscoobltd.blogdun.com/30090867/the-smart-trick-of-knights-armament-m4-rail-that-nobody-is-discussing