Add the 6mm ARC to Your AR-15 Arsenal

The Resolute, Mk 4, AR-15 Upper Group in 6mm ARC is ready to top your existing AR-15 lower. Just add an optic and you are ready to rock. This 6mm ARC upper group features a 16.1" 416 stainless steel barrel with a rifle length gas system and a CMMG Zeroed muzzle break, CMMG Zeroed M-LOK hand guard, a CMMG Zeroed ambidextrous charging handle, and a complete bolt carrier group. Adding the optics and accessories of your choice is easy on the optic ready, flat-top, 6061-T6 billet aluminum receiver and M-LOK rail. The Resolute lets you get into the 6mm ARC realm without the need to purchase an entire rifle.

CMMG Resolute Mk4 AR-15 Upper Group Specifications and Features

• Item Number: 60B1091-AB
• Mk4/AR15 Upper Receiver Group
• Mk4 Platform, Gas Direct Impingement
• 16.1" 416 Stainless Steel Barrel, 1:7.5 Twist
• Medium Profile
• Rifle Length Gas System
• 0.750 Gas Block
• CMMG Zeroed Muzzle Brake, 5-8" x 24
• CMMG EML15 M-LOK Hand Guard
• CMMG Zeroed Ambidextrous Charging Handle
• CMMG Zeroed Dust Cover
• Complete Bolt Carrier Group
• Billet 6061-T6 Aluminum Receiver
• Picatinny Rail
• Weight: 4.3 lbs
• Length: 25"
• Armor Black Cerakote Finish