ATI Mossberg Remington Winchester 12 Gauge Shotforce Adjustable Stock, Black - B.1.10.2000. The ATI 12 gauge Shotforce adjustable tactlite shotgun pistol grip stock is a collapsible stock constructed of weather proof and rugged DuPont Extreme Temperature Glass Reinforced Polymer. ATI's TrackLOCK System eliminates movement of the stock and the need for secondary locking mechanism while providing smooth secure stock adjustments. It has a Scorpion recoil pad, and dual sided quick detach attachment points. All mounting hardware is included. Upgrade your tactical shotgun with the Shotforce adjustable pistol grip stock from Advanced Technology International.