Archangel Tactical Stock System for Remington 870 with Shell Carrier - AA870SC An advanced Tactical Stock System for the Remington 870 12 gauge shotgun utilizing a proprietary lightweight carbon-fiber reinforced polymer impervious to weather and able to withstand all standard gun solvents and oils. A six-position collapsible butt-stock allows shot-gunners of all sizes to find the optimum adjustment for fit and comfort.