The MOE SL Stock - Mil-Spec Model (MOE Slim Line) is a drop-in replacement buttstock for AR15/M4 carbines using Mil-Spec sized receiver extension tubes. Designed for the modern battlefield, the sleek profile, dual-side release latches, rolled toe, and angled rubber butt-pad are optimized for use with body armor or modular gear and provides for efficient shoulder transitions. Made in the USA. Platform AR10, AR15, M4, M16, M110, SR25 Compatibility Mil-Spec sized carbine receiver extension tube (not included) from manufacturers such as Colt, LMT, Ruger, S&W, SIG, and others LOP, M4 Collapsed ~10.8 in. LOP, M4 Extended ~14.1 in. LOP Adjustment Range 3.3 in. Length, max 7.2 in. Weight 9.6 oz. Weight, w/ receiver extension 13.6 oz.