CMMG Mk4 Resolute 100 6mm ARC

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The 100 Series features classic furniture appointments such as the beloved A2 pistol grip and a 6-position butt stock. Chambered in 6mm ARC, this AR is ready for the range.

The Mk4 platform accepts standard AR15-style magazines, and is the most versatile of the CMMG platforms, especially with the .22 LR, 5.7x28mm (Conversion), and 9mm conversions.

CMMG’s RESOLUTE rifle and carbine lineup is engineered with purpose for those who refuse to compromise on quality. Each RESOLUTE rifle is designed for balance, accuracy and maneuverability. Whether you’re defending your family or looking to bring out your best at the range, the RESOLUTE keeps going when you need it most.

All Products come with CMMG’s Lifetime Quality Guarantee.


  • Manufacturer: CMMG
  • Model: Resolute 100 Mk4
  • Caliber: 6mm ARC
  • Barrel: 16.1"; 1:7.5" Twist; 5/8x24 Thread
  • Upper Receiver: Forged 7075 T6 Aluminum; M4 Type
  • Lower Receiver: AR15
  • Handguard: CMMG RML15 M-LOK
  • Finish: Black Hard Coat Anodized
  • Charging Handle: CMMG Mil-Spec
  • Pistol Grip: CMMG A2
  • Receiver Extension: 6-Position Enhanced Receiver Extension and Ambi Sling Plate
  • Stock: CMMG M4
  • Trigger Type: Mil-Spec Single Stage
  • Trigger Guard: CMMG Mil-Spec
  • Safety Selector: CMMG Mil-Spec
  • Magazine: 10 Rounds
  • Weight: 6.3 lbs
6mm ARC