Barrel Subassm 16.1" MT 4140CM SBN 5.56

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Barrel Sub Assembly

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

Description:

• Caliber    5.56x45mm
• Barrel Length    16.1
• Barrel Twist    1:7
• Barrel Contour    MT
• Barrel Twist    1:7
• Muzzle Thread    1/2 X 28
• Gas Port Location    Mid
• Gas Block    0.750
• Weight    1.56 lbs