CMMG Barrel Sub-Assm 16.1inch MT 4140CM SBN 5.56mm
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$222.99
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$222.99
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Aug 26, 2026
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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? Medium Taper Profile 4140 Chrome Moly Salt Bath Nitride Finish inside and out 1:7 Twist 5.56x45 NATO Chamber Threaded 1/2-28 Midlength gas port .750? Gas Journal
