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