The Strike Shotgun Barrel Clamp helps to add strength and rigidity to your magazine tubes with the ability to attach accessories and a sling point. It's a lightweight barrel clamp is machined from 6061-T6 aluminum. One side of the barrel clamp features a Picatinny (Pic) rail to mount a weapon light or other accessories such as a laser. On the other side you have an anti-rotate quick detach (QD) socket for your favorite sling. Includes: Shotgun Barrel Clamp Antirotate QD side, Shotgun Barrel Clamp Picatinny side, M4x15mm Hex socket screws, Hex tool [3mm], Loctite Threadlocker Blue 243, Warning card