CMMG 350 Legend 16.1" Barrel w/ 1/2-28 Thread & 1:16 Twist, Black SBN Finish

Perfect for building your custom Mk4 upper group. Comes with properly installed M4 barrel extension. All barrel sub-assemblies are properly head spaced. Made of 4140CM with a SBN finish. - Caliber: 350 Legend - Length: 16.1 inches - Twist: 1:16 - Thread pitch: 1/2-28 - Gas system: Carbine length - Finish: SBN - Material: 4140 chrome moly Notes: Designed for Mk4 upper group builds, with proper head spacing.