The MOE Fixed Carbine Stock - Mil-Spec Model (Magpul Original Equipment) provides an inexpensive, fixed, non-collapsing stock option for mil-spec size carbine-length buffer tubes.The MOE Fixed Carbine Stock has a slim profile, improved cheek weld, and multiple sling attachment options, and is compatible with ASAP(R) Plates and PRS(R) Extended Rubber Butt-Pad. Installation is non-armorer and does not require the castle nut or lock plate to be removed.Made in U.S.A.FEATURES Fixed length for standard mil-spec sized M4 Carbine receiver extension tubes (not included) from manufacturers such as Colt, LMT, Ruger, S&W, SIG, and others (please see the note below) ~12.2" Length of Pull Integrated 1.25" sling loops Compatible with ASAP Plate & PRS Extended Rubber Butt-Pad Durable polymer construction Available left/right side push-button QD Sling Mount Kits (not included)