What sets the M4 RAS in addition to other two-piece quad rails available is that it securely locks to the rifle’s barrel nut through a clamp and screw arrangement, making it an incredibly stable foundation upon which to mount tactical extras. Posted by BRAD on twenty third Jan 2020 Magnificent https://trentonwqfxu.spintheblog.com/29879034/fascination-about-m4-ras-rail