Uncle Mike's magazine cap swivel set has a factory magazine cap with the swivel base already installed. All you have to do is unscrew the factory magazine cap and replace it with the new cap. For the buttstock, a 3/4" wood screw swivel base is included, along with two super swivels with Tri-Lock.

Fits: 12 gauge Mossberg 590/835 1" slings

Color: Black

Material: Steel