Striking the balance between long-range performance and maneuverability this 20 ENDEAVOR Mk3 Upper Group in .308 WIN can pack a punch up close and at extended distances. The CMMG Mk3 platform is based on the popular LR-308/DPMS Gen 1 High-Pattern design. Every ENDEAVOR Upper Group includes the bolt carrier group as well as a carefully curated selection of parts and accessories including: – ZEROED .308 Ambi Charging Handle – ZEROED Mk3 Polymer Dust Cover – ZEROED Muzzle Brake .308 – Platform: Mk3 – Caliber: .308 WIN – Operating System: Direct Impingement – Barrel Length: 20 – 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: 6.0 lbs – Length: 30.2