Uncle Mike's Magazine Cap with Swivel Base – Mossberg 500

Now you can add sling swivels to your favorite pump or auto without altering your shot gun Uncle Mike?s new magazine cap swivel sets have a factory magazine cap with the swivel base already installed. Just unscrew the factory magazine cap and replace it with the new cap. For the buttstock a 3/4? woodscrew swivel base is included along with two super swivels.