Phase 5's Sloped Quick Disconnect End Plate was specifically engineered to replace the standard AR/M4 carbine end plate. The Phase 5 Sloped Quick Disconnect End Plate is compatible with mil-spec carbine receiver extensions, commercial-spec receiver extensions, and all Phase 5 Pistol Buffer Tubes on almost all AR-15/M4/.308 AR Variant lower receivers. Pull force rating of 200 lbs Made in America Accepts push button QD swivels and QD slings QD mount is at a 30 degree angle from lower receiver Phase 5's Sloped Quick Disconnect End Plate maintains industry-standard requirements while introducing new technology to make the entire product lighter Mfg: Phase 5 Tactical