The BOSS-CR accessory offers all the accuracy and tunable advantages of the original BOSS device without the muzzle brake feature. By simply replacing the original BOSS forward weight and recoil reduction components with the one-piece non-ported BOSS-CR accessory only the reduced recoil of the original BOSS is sacrificed. The BOSS-CR accessory is designed to fit only BAR Mark II and A-Bolt centerfire rifles previously factory-fitted with the BOSS.