BARREL SUB-ASSM - 16.1" MT 4140CM SBN, 5.56MM CAL

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