The CMMG 16.1-inch Barrel Sub-Assembly is crafted for enthusiasts looking to build a high-performance AR15 upper group. Featuring a medium taper profile and a 1:7 twist rate this barrel is optimized for precision and stability when using 223 Remington or 5.56 NATO rounds. Its midlength design ensures a balanced performance while the nitride finish enhances durability and resistance to wear. With a properly installed M4 barrel extension this assembly offers reliability and seamless integration for custom builds.