ATI Outdoors Mossberg/Winchester 12-Gauge Mag-Socket Black One Size. ATI has developed the Mag Socket Wrenches that allows for quick changes of any forend including all ATI forends for Mossberg and Winchester shotguns. Specifications for ATI Outdoors Mossberg/Winchester 12-Gauge Mag-Socket: Manufacturer: ATI Outdoors Gun Model: Mossberg Model 535 Mossberg Model 5500 Mossberg Model 590 12 Gauge Winchester Model 1300 12 Gauge Winchester Model 1200 12 Gauge Mossberg Model 835 12 Gauge Mossberg Model 500 12 Gauge Gauge: 12 Caliber: 12 Gauge Additional Features: Standard Activity/Occasion: Outdoor Hike Casual Travel Work Duty Sports Quantity: 1 Style: Tactical Size: One Size Fabric/Material: 6061-T6 Aluminum Application: Casual Everyday Work Tactical Outdoor Fit: Regular Color: Black Age Group: Adults Seasonal/Temperature Use: All Seasons Gender: Unisex Features of ATI Outdoors Mossberg/Winchester 12-Gauge Mag-Socket Allows for Easy Disasmbly and Installation of Forends Reduces the Amount of Time it Takes to Change Forends Prevents Disassembly of Action to Change the Forend Checkered Grip Laser Etched Lettering Package Contents: ATI Outdoors Mossberg/Winchester 12-Gauge Mag-Socket What firearm models does the manufacturer say ATI Outdoors Mossberg/Winchester 12-Gauge Mag-Socket is compatible with? The manufacturer says that ATI Outdoors Mossberg/Winchester 12-Gauge Mag-Socket is compatible with Mossberg Model 835 12 Gauge Mossberg Model 500 12 Gauge Winchester Model 1300 12 Gauge Winchester Model 1200 12 Gauge Mossberg Model 535 Mossberg Model 590 12 Gauge Mossberg Model 5500ATI Outdoors A.5.10.2330: Mossberg/Winchester 12-Gauge Mag-Socket Black One Size