CMMG Resolute MK4 Upper Reciever 6mm ARC 16.1 Barrel

Overview

CMMG Resolute MK4 Upper Receiver Features The CMMG Resolute MK4 Upper Receiver is chambered in 6mm ARC a cartridge engineered to deliver long-range precision and superior ballistic performance within the standard AR15 platform without requiring a larger format rifle. The 16.1 barrel is constructed from 416 stainless steel with a salt bath nitride finish and a 1:7.5 twist rate optimized for stabilizing the full range of 6mm ARC projectile weights from lighter varmint loads to heavier match and hunting bullets. A rifle-length gas system with a 0.750 non-adjustable gas block provides smooth and reliable cycling across a wide range of loads and the 5/8x24 threaded muzzle is topped with the CMMG ZEROED muzzle brake for immediate recoil reduction right out of the box. For precision shooters and AR15 builders who want to step up to 6mm ARC capability on a proven direct impingement platform the CMMG Resolute MK4 Upper delivers the accuracy and reliability the cartridge demands. The billet 6061 T6 aluminum upper receiver provides a rigid and precisely machined foundation for the barrel and handguard assembly and the CMMG EML15 M-LOK handguard offers a slim and lightweight profile with extensive M-LOK attachment points for lights lasers grips and bipods along its full 15 length. CMMG includes the ZEROED ambidextrous charging handle for left and right-handed operation without modification and the ZEROED AR15 polymer dust cover protects the receiver interior from debris in the field. Founded in 2002 and manufactured entirely in the United States CMMG backs every upper receiver with a lifetime warranty against defects in material or workmanship. For AR15 builders and precision rifle enthusiasts who want a complete American-made 6mm ARC upper that ships ready to mount and shoot the CMMG Resolute MK4 Upper Receiver is available now at GrabAGun. CMMG Resolute MK4 Upper Receiver Specifications Manufacturer: CMMG Model: Resolute MK4 Upper Receiver Type: AR15 Pattern Upper Receiver Group Caliber: 6mm ARC Finish: Cerakote Platform: MK4 Operating System: Direct Impingement Barrel Length: 16.1 Barrel Material: 416 Stainless Steel Salt Bath Nitride Barrel Contour: MT Barrel Twist: 1:7.5 Muzzle Device: CMMG ZEROED Muzzle Brake Muzzle Thread: 5/8x24 Gas System: Rifle Length Gas Block: 0.750 Non-Adjustable Upper Receiver: Billet 6061 T6 Aluminum Handguard: CMMG EML15 M-LOK Charging Handle: CMMG ZEROED Ambidextrous Weight: 4.3 lbs Length: 25 Includes: Bolt Carrier Group ZEROED Ambi Charging Handle ZEROED Muzzle Brake ZEROED Polymer Dust Cover Available At: GrabAGun