Cmmg 12.5'' BBL SUB-ASSY MC 1-10 5/8-24'' BLACK NITRIDE 38D920A

Perfect for building your custom MK3 upper group. Comes with a properly installed barrel extension. All barrel sub-assemblies are properly headspaced.

• For .308 Winchester Rifles
• 12.5” Barrel Length
• Medium Taper Contour
• Mid-Length Gas System
• 1-10 Twist
• 5/8-24 Threads
• Salt Bath Nitride Finish