Discover the CMMG AR-15 12.5'' 300 Blackout MR Barrel expertly crafted for precision and reliability. Designed for the AR-15 platform this barrel features a medium contour that balances weight and accuracy. The durable nitride finish ensures longevity and performance in various conditions. With a pistol-length gas system it is optimized for smooth cycling and reduced recoil. The 12.5-inch length is ideal for maneuverability making it perfect for tactical applications. Featuring 5/8-24 muzzle threads it supports a range of muzzle devices while the 1-7 twist rate stabilizes a wide array of bullet weights for versatile shooting experiences.