Aim Sports 6-Pos Collapsible Stock w/ Pistol Grip for Mossberg 500/590 is a tactical drop-in upgrade kit for 12-gauge Mossberg pump-action shotguns. Fits 500, 500A, 535, 590, 835, and Maverick 88. Features M4-style 6-position collapsible buttstock on heavy-duty aluminum buffer tube with integrated ergonomic ambidextrous pistol grip. Grip and buttstock molded from high-strength glass-filled nylon polymer in matte black. Adjustable LOP for body frames or armor. Hollow grip offers internal storage; ambidextrous sling points included. Kit contains grip, buttstock, buffer tube, and mounting hardware. Installs in minutes, no permanent gunsmithing. Not for handguns or rifle chassis. Safety note Follow all manufacturer installation instructions. Verify proper function and secure mounting before use. Comply with local firearm laws and regulations.