CMMG 33A030CAB: Most wouldn\'t consider a 12.5 Banshee a tool for the hunter but when chambered in 8.6 Black it becomes a no brainer. Carrying on the AR15\'s reputation for modularity CMM builds our larger caliber rifles like .308 WIN 6.5 Creedmoor and now 8.6 Black on our Mk3 (AR-10) size platform which is based on the LR-308/DPMS Gen 1 high-pattern design. - Platform Mk3 - Caliber 8.6 Black - Operating System Direct Impingement - Barrel Length 12.5 - Barrel Twist 1:3 - Barrel Contour MT - Barrel Material 4140CM Nitride Finish - Barrel Twist 1:3 - Muzzle Device CMMG Zeroed Linear Compensator - Muzzle Thread 5/8 x 24 - Gas Port Location Pistol - Gas Block Adjustable 0.750 - Upper Receiver Billet 7075 T6 Aluminum - Lower Receiver Mk3 Billet 7075 T6 Aluminum - Hand Guard CMMG EML11 M-LOK - Finish Cerakote - Charging Handle CMMG Zeroed Ambi - Pistol Grip CMMG Zeroed Pistol Grip - Buffer Type Carbine Mk3 - Receiver Extension CMMG 6 Position Fastback w/Ambi Sling Plate - Stock / Brace CMMG RipBrace - Trigger Type Zeroed Drop-In Single Stage - Trigger Guard Integrated - Safety Selector CMMG Zeroed 60/90 Degree - Magazine Magpul 20rd PMAG - Weight 7.4 lbs - Length 29.5