CMMG

Barrel Assembly 12.5″ MR 4140CM SBN 5.56mm w/LPGB

Perfect for building your custom AR15 upper group. Comes with properly installed M4 barrel extension barrel nut .750 lo-pro gas block hand guard cap pinned “F” marked front sight base sling loop and front sight post. All barrel assemblies are properly headspaced.

Description:

• 12.5″
• Multi Role Profile
• 4140 Chrome Moly
• Salt Bath Nitride Finish inside and out
• 1:7 Twist
• 5.56×45 NATO Chamber
• Threaded 1/2-28
• Carbine length gas port
• .750″ Gas Journal
• .750″ Lo-Pro Gas Block
• “F” Marked Front Sight Base