Custom machine screw fore end base allows for mounting on Mossberg 500 shotguns and tube magazine lever action rifles, carbines with fore end band. Some gunsmithing required. Set also includes .75" rear wood screw swivel stud, spacer and one pair GT Locking Swivels.Machine screw swivel stud fits on the existing Mossberg 500 mag caps. Also includes 3/4 inches rear wood screw stud with spacer and (2) locking swivels. Features: Each set includes needed hardware