Rugged, machined aluminum rail mount clamps around 12 gauge shot 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 fromnt—so it won"t be obstructed by your support hand or other gear. Will Fit All 12ga Shot Tubes 5 Position Accessory Mounting 3, 4/5, 6, 7/8 & 9 O"clockThree 1913 MIL SPEC Picatinny Rails6061 Aircraft Grade Aluminum CNC MachinedAmbidextrous Type II Class 3 Hard Black Anodized Ultra Light Weight Lifetime Warranty 100% USA Made