Building an AR in a larger caliber like .308 Win doesn’t mean you have to sacrifice portability. The BANSHEE Mk3 upper group chamber in .308 Win is just the thing to complete the go anywhere .308 AR10. The CMMG Mk3 platform is based on the popular DPMS Gen 1 high-pattern LR308 design. All CMMG Upper Groups come complete with bolt carrier group and ZEROED accessories including: - ZEROED Polymer Dust Cover .308 - ZEROED AR15 Ambi Charging Handle - ZEROED Linear Compensator .308 Win - Platform: Mk3 - Caliber: .308 WIN - Operating System: Direct Impingement - Barrel Length: 12.5 - Barrel Twist: 1:10 - Barrel Contour: MT - Barrel Material: 4140CM SBN - Muzzle Device: CMMG ZEROED Linear Compensator - Muzzle Thread: 5/8 x 24 - Gas Port Location: Mid - Gas Block: 0.750 Non-Adjustable - Upper Receiver: Billet 7075 T6 Aluminum - Hand Guard: CMMG EML11 M-LOK - Finish: Cerakote Standard - Charging Handle: CMMG ZEROED Ambi - Weight: 5.1 lbs - Length: 22.2