Build the ultimate .308 Win carbine with the RESOLUTE Mk3 upper group. Combining heavy hitting performance with styling in a league of its own there is no doubt that this upper will set your rifle apart from the crowd. There can be a lot of confusion with .308 AR platforms and compatibility CMMG has kept it simple by basing our Mk3 platform off the popular Gen 1 DPMS High-Pattern LR308 design which means greater parts availability and more customization potential. Available in six different Cerakote finishes all CMMG Upper Groups come complete with bolt carrier group and ZEROED accessories including: - ZEROED Mk3 Polymer Dust Cover - ZEROED .308 Ambi Charging Handle - ZEROED Muzzle Brake .308 - Platform: Mk3 - Caliber: .308 WIN - Operating System: Direct Impingement - Barrel Length: 16.1 - Barrel Twist: 1:10 - Barrel Contour: MT - Barrel Material: 416SS SBN - Muzzle Device: CMMG ZEROED Muzzle Brake - Muzzle Thread: 5/8 x 24 - Gas Port Location: Rifle - Gas Block: 0.750 Non-Adjustable - Upper Receiver: Billet 7075 T6 Aluminum - Hand Guard: CMMG EML15 M-LOK - Finish: Cerakote Standard - Charging Handle: CMMG ZEROED Ambi - Weight: 5.8 lbs - Length: 28.3