The MRE package is intended to do the job with M4 carbines, and accommodates a set A2 entrance sight tower with carbine size fuel procedure. It extends previous the entrance sight base, offering extra rail House for the mounting of tactical extras. Incorporates a few KAC 11 Rib Rail Panels. https://knightsarmamentm4quadrail51616.jiliblog.com/84216425/everything-about-knights-armament-rail