CMMG Inc Barrel Sub-Assembly Mediun Taper Profile 308 Win 12.5in 416SS Salt Bath Nitride. CMMG constructed these Rifle Barrels with a properly installed barrel extension so that you can save even more time by avoiding the extra hassle of installing a barrel after the fact. This CMMG 308 Rifle Barrel Sub-Assembly comes headspaced for a reliable build and the 5/8x24 threads allow for the installation of a variety of accessories you may need down the road. Make sure you pick up a CMMG 308 Barrel Sub-Assembly w/ Extension if you're looking to build your own MK3 upper group. Specifications for CMMG Inc 308 Win Barrel Sub-Assembly: Manufacturer: CMMG Caliber: .308 Winchester Barrel Twist Rate: 1-10 Flutes: No Gun Model: AR-10 Condition: New Firearms Threads Per Inch: 5/8x24 Package Contents: CMMG Inc 308 Win Barrel Sub-Assembly What firearm models does the manufacturer say CMMG Inc 308 Win Barrel Sub-Assembly is compatible with? The manufacturer says that CMMG Inc 308 Win Barrel Sub-Assembly is compatible with AR-10CMMG Inc CMM MK3 Medium Taper Profile Barrel Sub-Assembly 416SS .308 Winchester 12.5 Inch 5/8-24 Threads Salt Bath Nitride Finish