Fit: - Tamers/Pistol grips use a short bolt that is included with the Tamer (no washer needed). - Forend adapter nut may be required for some models. #05020Also fits: - Model 590A1- Maverick model 88- Other Mossberg pump shotguns that are copies or variations of the 500. - 510 MiniDoes not fit: - 930 series or any other auto shotgun. - Break open guns- Flex system shotguns Measurements: Pistol Grip:- Weight (with bolt): 6.23 ozForend: -Weight: 5.17 oz