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    Perfect for building your custom AR15 upper group. Comes with properly installed M4 barrel extension. All barrel sub-assemblies are properly headspaced.


    • 16.1″ 
    • Heavy Taper Profile
    • 4140 Chrome Moly
    • Salt Bath Nitride Finish inside and out
    • 1:7 Twist
    • 5.56×45 NATO Chamber
    • Threaded 1/2-28
    • Midlength gas port
    • .936″ Gas Journal

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