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.