Daniel Defense. Adjustable butt stock for AR-15 carbines. Constructed of proprietary blend of glass infused polymers and finished off with soft touch rubber overmolding in strategic points. Mil-Spec. Very little forward or lateral play. This eliminates the need for tension device or friction lock. 2 butt pads included. Thicker convex .8" & thinner concave shape .5". Designed to keep from snagging. Length: 7", Height: 5.5", Thickness: 1.75", Weight: .5lb. Made in U.S.A.