AR15 Quick Detachable Receiver End Plate. Designed for Standard Mil-spec AR15 Lower Receiver. Solid Steel Construction with a Matte Black Finish. Unique Low Profile Design Allows Operation of Most Collapsible Stocks in All Positions Including Being Fully Collapsed. Accepts Any Quick Detach Sling Swivel with 0.37” Diameter Swivel Stud. QD Sling Swivel Housing Designed with Quarter-turn Rotational Over Travel Stops to Restrict Swivel Movement and Prevent Binding Against the Buffer Tube and Sling Tangling.