Outdoor connection's mossberg 500 magazine takedown bolts replaces the original shotgun magazine tube cap.Features a distinctive knurl pattern and a swivel base that rotates 360 degrees.3/4" wood screw swivel base, accepts all standard u.S.Detachable swivels allowing easy installation of any sling.Fits mossberg 12/16/20 gauge.Type: Mag/Cap Swivel SetColor: BlackMaterial: Magazine Takedown BoltsCap Size: SteelDesign: Mossberg 500Thread Type: Mossberg