Designed for the “Fill-The-Gap” barrel clamping system featured with all CST Rimfire Receivers. Fully compatible V-Block Barrel Clamp for any 10-22 setup. CNC machined from hardened 416 stainless steel, lighter weight and yet much harder material than the factory version.  Will not bend or distort during clamping! Stainless steel socket head screws included. Replaces factory V-block and screws.