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PRODUCT #64ACF90

Resolute 300
Mk4, 6.5 Grendel

$1,549.95

$1,549.95

CMMG is temporarily halting the sale of complete firearms, upper receiver groups, lower receiver groups, and Radial Delayed Blowback BCG kits on our website in order to focus on outstanding orders. We apologize for the inconvenience and appreciate your patience as we traverse this extremely busy time. Sign up for notifications on your favorite products to get notified when they become available again or find a local dealer on our dealer page.

RIFLE, RESOLUTE™ 300, MK4, 6.5 GRENDEL

If you want the best an AR has to offer, then the 300 Series is your choice. This AR is fitted with every desired feature including a choice of 10 Premier Cerakote colors, laser engraved model name on the lower receiver, updated ambidextrous controls and sling points along with a Geissele Automatics SSA 2-Stage trigger, Magpul MOE grip, CMMG's revolutionary RIPSTOCK, and a CMMG SV muzzle brake. These are just a few of the possible upgrades on this series. Chambered in 6.5 Grendel, this AR is ready for the range.

The Mk4 lower receiver accepts standard AR15-style magazines, and is the most versatile of the CMMG platforms, especially with our Upper Groups and a matching Conversion Kit (available in .22 LR, 5.7x28mm, and 9mm). 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. Available in three tiers —RESOLUTE 100, RESOLUTE 200 and RESOLUTE 300 — that cater to your intended needs and customization. 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 CMMG products come with our Lifetime Quality Guarantee.

Technical Specifications

Platform Mk4
Caliber 6.5 Grendel
Operating System Direct Impingement
Barrel Length 16.1
Barrel Twist 1:08
Barrel Contour MT
Barrel Material 416SS, SBN
Barrel Twist 1:08
Muzzle Device CMMG SV Brake
Muzzle Thread 5/8-24
Gas Port Location Rifle
Gas Block 0.750 Non-Adjustable
Upper Receiver Forged 7075-T6 Aluminum M4 Type
Lower Receiver AR15
Hand Guard CMMG RML15 M-LOK
Finish Cerakote Receivers, Handguard, Ripstock
Charging Handle CMMG ZEROED Ambi Charging Handle AR15
Pistol Grip Magpul MOE
Receiver Extension 6 Position Receiver extension and ambi sling plate
Stock / Brace CMMG Ripstock
Trigger Type Geissele Automatics SSA 2-stage
Trigger Guard Magpul MOE
Safety Selector CMMG Ambi
Magazine 10rd
Weight 6.4

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