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Rosco Manufacturing Bloodline 5.56 NATO 16″ 1:7 Barrel – Black
Rosco Manufacturing Bloodline Heavy Barrel556NATO16″Black Nitride Finish1:7 Twist1/2×284150 CMVFeatures:4150 CMVHeavy barrel profile1:7 twist1/2X28 thread pitchCarbine gas systemNitride finish