Lion Gears BridgeMount Tactical Shotgun Cantilever Barrel Mount w/ 4 Slots Picatinny Rails for 12ga Shotgun, 1.75" Long, BMR0425EX Tactical Shotgun Barrel Mount, fit 12ga Shotgun Magazine Tube Rock Solid Construction with Light Weight Aircraft Aluminum, only 1.1 oz Small Mounting Deck, only 18mm. Perfect to Mount on Shotgun Magazine Tube Offer Easy Mounting Solution for Tactical Accessories, such as Flashlight or Laser