CMMG Resolute Mk4 Upper Group .300 BLK 16.1″ Black

The CMMG Resolute Mk4 Upper Group in .300 BLK is a versatile choice for your next carbine build. Featuring a 16.1-inch 4140CM SBN barrel with a 1:7 twist rate, this upper is designed for both subsonic and supersonic applications, making it ideal for hunting, personal defense, or target shooting. Compatible with any standard AR-15 lower, this upper group includes a CMMG ZEROED muzzle brake and an ambidextrous charging handle. The billet 6061 T6 aluminum upper receiver and CMMG EML15 M-LOK handguard ensure durability and functionality. Weighing 4.1 lbs and finished in Cerakote, this upper group is available in six different finishes to match your aesthetic preferences.

Key Features

• Caliber: .300 BLK
• Barrel Length: 16.1 inches
• Material: 4140CM SBN
• Gas System: Carbine
• Muzzle Device: CMMG ZEROED Muzzle Brake
• Handguard: CMMG EML15 M-LOK
• Upper Receiver: Billet 6061 T6 Aluminum
• Weight: 4.1 lbs
• Finish: Cerakote
• Includes ZEROED AR15 accessories

Available from ICB Firearms, this upper group comes complete with a bolt carrier group and offers fast nationwide shipping or local pickup in Saint Clair Shores, Michigan.