Rear Pistol Grip with Sling Adapter Compatible with Mossberg 500 / 590 – Polymer Stock Adapter with Storage CompartmentUpgrade your setup with this rear pistol grip with sling adapter, engineered for compatibility with Mossberg 500 and 590 platforms (12 & 20 gauge). Designed for strength, comfort, and versatility, this polymer stock adapter allows users to attach collapsible rifle style stocks while maintaining a lowered stock elevation for proper sight alignment. Constructed from high strength glass filled nylon, this one piece grip delivers exceptional durability