Magpul MAG347-BLK MOE SL Carbine Stock Black Synthetic for AR-15/M16/M4 with Mil-Spec Tube (Tube Not Included)Made in the USA, 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.