Upgrade your AR15 with CMMG's 16.1-inch 300 Blackout Barrel SubAssembly designed for precision and performance. This barrel features a medium taper profile and a durable nitride finish ensuring long-lasting reliability. With a 1:7 twist rate it optimizes bullet stabilization for enhanced accuracy while the carbine length design balances compactness and performance. Perfect for custom builds this subassembly includes a properly installed M4 barrel extension making it a top choice for firearm enthusiasts seeking quality and precision in every shot.