– A flat washer MUST be used with the factory stock bolt. A washer is included with the stock. The Hogue stock is designed to reuse the factory stock bolt with the addition of the flat washer.
– The stock bolt (not included) is a 5 ½”long 5/16” – 18 TPI with a flat washer available at any quality hardware store gun parts retailer or from Mossberg directly. You must use this bolt when changing from a pistol grip or Tamer to a butt stock. 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. #05020

Also fits:
– Model 590A1
– 835 series 3 ½” magnum pump shotguns providing adapter nut #05020 is used
– Maverick model 88. Forend may require replacement of action bars (slide tube) with 7 ¾” “metal tube” type
– Other Mossberg pump shotguns that are copies or variations of the 500.

Does not fit:
– 16ga 20ga or .410 bore shotguns
– 510 Mini
– 930 series or any other auto shotgun.
– Break open guns
– Flex system shotguns