CMMG AR15 5.56x45mm MR 4140CM SBN Lufa 12.5″

Barrels are the heart of a rifle or pistol, CMMG barrels are made with quality and precision as top priority. Comes with a properly installed M4 barrel extension. All barrel sub-assemblies are properly headspaced. Rest assured that all barrel sub-assemblies are properly headspaced and perfect for your next AR build. Specs: Length: 12.5″ Twist: 1:7 Gas Port Diameter: .750 Chamber: 5.56x45mm Nato Thread Pitch: 1/2 x 28 Gas Tube Length: Carbine M4 Feed Ramps Barrel material: 4140CM Barrel contour: MR Finish: SBN Weight: 1.5 LBS NOTE: C.I.P. NOT included For use with 5.56 Nato and .223 Rem ammunition For compatible accessories, see accessories under this article MADE IN THE USA