CMMG MR Barrel Black 5.56 / .223 Rem 12.5-inch

CMMG Inc Barrel Sub-Assembly Multi Role Profile 5.56mm 12.5in 4140CM Salt Bath Nitride. Comes with properly installed M4 barrel extension. All barrel sub-assemblies are properly headspaced. Features of CMMG Inc 5.56x45mm Nato Mk4 Barrel Sub Assembly - 12.5inch Mr 4140cm Sbn 5.56mm: 12.5" Multi Role Profile 4140 Chrome Moly Salt Bath Nitride Finish inside and out 1:7 Twist 5.56 45 NATO Chamber Threaded 1/2-28 Carbine length gas port .750" Gas Journal Package Contents: CMMG Inc 5.56x45mm Nato Mk4 Barrel Sub Assembly - 12.5inch Mr 4140cm Sbn 5.56mm Specifications for CMMG Inc 5.56x45mm NATO Barrel Sub-Assembly: Manufacturer: CMMG Cartridge: 5.56x45mm NATO Threads per Inch: 1/2x28 Barrel Twist Rate: 1-7 Flutes: No Gun Model: AR-15 Included Accessories: Standard Condition: New Gun Type: Rifle Package Contents: CMMG Inc 5.56x45mm NATO Barrel Sub-Assembly CMMG Inc 5.56x45mm Nato Mk4 Barrel Sub Assembly - 12.5inch Mr 4140cm Sbn 5.56mm - 55DDF0A