Z-2 Alloy Integral Ring/Base System - Medium (Black) Fits all CVA In-Line Muzzloaders, Traditions In-Line Muzzleloaders, Winchester In-Line Muzzleloaders, and T/C Encore, Omega, Triumph Muzzleloaders. Our Z2 Alloy mounts provide features available on very high-end steel rings and bases. We’re so confident in the durability of our scope mounts that they are Guaranteed for Life!