CMMG 7.62x39mm Non-Threaded Barrel 16.1in Empire Profile Black. 1" Empire Profile barrel sub-assembly is engineered for 7.62x39mm featuring a medium-taper design crafted from 4140 Chrome-Moly steel with a durable Salt Bath Nitride (SBN) finish. The barrel incorporates an unthreaded muzzle with a recessed target crown. This configuration was specifically developed to provide a reliable option for areas with specific firearm regulations while maintaining CMMG's standards for accuracy and durability. Specifications for CMMG 7.62x39mm Non-Threaded Barrel: Manufacturer: CMMG Color: Black Finish: Anodized Caliber: 7.62x39mm Barrel Length: 16.1 in Barrel Profile: Medium Barrel Material: 4140 Chrome Moly Vanadium Flutes: No Gun Make: CMMG Gun Model: AR-15 Gas System Type: Direct Impingement Gun Type: Rifle Threads per Inch: Non Threaded Features of CMMG 7.62x39mm Non-Threaded Barrel 16.1" barrel length 7.62x39mm chambering 4140CM steel construction Salt Bath Nitride finish Unthreaded muzzle design Recessed target crown Medium taper Empire Profile Package Contents: CMMG 7.62x39mm Non-Threaded Barrel What firearm models does the manufacturer say CMMG 7.62x39mm Non-Threaded Barrel is compatible with? The manufacturer says that CMMG 7.62x39mm Non-Threaded Barrel is compatible with AR-15CMMG 76D330A: 7.62x39mm Non-Threaded Barrel 16.1in Empire Profile Black