Increase accuracy and improve performance when upgrading your original factory barrel. Tac-Hammer Package includes barrel, cantilevered optic rail and front threaded compensator.Tac-Hammer's Rigid-Core Barrel for Ruger's 10/22 (RCB-22) delivers the benefits of a bull barrel's larger diameter and related stiffness greater accuracy and repeatability of shot without the added weight. A rigid-core, stepped barrel design is encased within a post-tension, aluminum shroud, offering the rigidity of a bull barrel with a significant reduction in weight. Improve rifle accuracy, performance, shouldering and portability.