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.