Rugged, machined aluminum rail mount clamps around 12 gauge shotgun magazine tube to provide rail space on three sides for secure mounting of tactical lights and laser aiming devices. Gets your light and/or laser where it belongs up front so it won't be obstructed by your support hand or other gear. Will Fit All 12ga Shotgun Tubes 5 Position Accessory Mounting 3, 4/5, 6, 7/8 & 9 O'clock Three 1913 MIL SPEC Picatinny Rails 6061 Aircraft Grade Aluminum CNC Machined Ambidextrous Type II Class 3 Hard Black Anodized Ultra Light Weight Lifetime Warranty 100% USA Made