CMMG RESOLUTE Mk4 6mm ARC Rifle: Precision, Power, and Performance in an AR-15 Platform

For discerning shooters and hunters who demand superior ballistic performance without sacrificing the compact and versatile AR-15 form factor, the CMMG RESOLUTE Mk4 6mm ARC stands as a compelling solution. Engineered to leverage the groundbreaking 6mm ARC (Advanced Rifle Cartridge), this rifle, bearing the model designation 60A10B5TNG, redefines what's possible within the popular AR-15 platform.

Introduced in 2020 by Hornady, the 6mm ARC was meticulously designed from the ground up to deliver exceptional long-range ballistics, rivaling larger cartridges typically found in AR-10/LR308 style rifles, all while maintaining compatibility with the smaller, lighter AR-15. This innovation means shooters can achieve impressive extended range capabilities, including reduced bullet drop and wind drift, from a more manageable and maneuverable firearm.

Who is the CMMG RESOLUTE Mk4 6mm ARC For?

This rifle is ideally suited for:

• Serious Hunters: Especially those pursuing medium-sized game like deer, hogs, or even coyotes and varmints at extended distances. The 6mm ARC offers excellent terminal performance and energy on target, making clean, ethical kills more attainable.
• Long-Range Precision Shooters: Individuals focused on competitive shooting, target practice, or simply pushing the limits of their accuracy at distances beyond what typical 5.56mm NATO or .223 Remington rounds can comfortably achieve from an AR-15. Its flat trajectory and high ballistic coefficient bullets are a significant advantage.
• AR-15 Enthusiasts: Those looking to expand their AR-15 collection with a caliber that offers a significant performance upgrade without requiring a jump to the larger, heavier AR-10 platform.
• Individuals Seeking a Versatile Carbine: If you need a rifle that can transition seamlessly between various roles – from a reliable hunting tool to a capable precision platform or a general-purpose sporting rifle – the RESOLUTE Mk4 6mm ARC offers exceptional adaptability.

When full-size rifles prove too cumbersome for dynamic situations or field conditions, and pistols or SBRs (Short-Barreled Rifles) don't deliver the necessary long-range ballistic performance, the CMMG RESOLUTE line of carbine-length rifles provides the perfect answer. It strikes an optimal balance, offering the handling characteristics of a carbine with the external ballistics of a dedicated long-range precision rifle.

The Power of the 6mm ARC Cartridge

What makes the 6mm ARC such a revolutionary choice, and why is it so well-matched with the CMMG RESOLUTE Mk4?

• Exceptional Ballistics: The 6mm ARC is engineered around modern, high-ballistic-coefficient (BC) 6mm projectiles. This design minimizes wind drift and maximizes retained energy downrange. Compared to cartridges like 5.56mm NATO, the 6mm ARC delivers significantly less bullet drop and superior energy delivery at 500 yards and beyond. For example, a common 108-grain 6mm ARC load can maintain supersonic velocities past 1000 yards, a feat difficult or impossible for standard AR-15 cartridges.
• AR-15 Compatibility: Despite its formidable performance, the 6mm ARC fits perfectly within the standard AR-15 magazine well and bolt face, requiring only a barrel and bolt change. This allows manufacturers like CMMG to build purpose-designed rifles that capitalize on the AR-15's ergonomic advantages, modularity, and widespread familiarity.
• Versatility: The cartridge performs admirably across a wide range of bullet weights, making it suitable for everything from varmint hunting with lighter bullets to medium game hunting and long-range precision shooting with heavier, high-BC projectiles.
• Predictable Performance: The consistent velocity and superior ballistic coefficient of 6mm ARC rounds contribute to highly predictable shot placement, which is crucial for ethical hunting and competitive accuracy.

The RESOLUTE Mk4 is specifically optimized with a 1:7.50" twist rate in its 16.10" barrel, a critical factor for stabilizing the diverse range of 6mm ARC bullet weights, especially the heavier, longer projectiles that unlock the cartridge's full long-range potential.

Unpacking the CMMG RESOLUTE Mk4 6mm ARC: Design and Features

The CMMG RESOLUTE Mk4 is not just a rifle chambered in 6mm ARC; it's a meticulously crafted system designed for peak performance and user experience. Fitted with CMMG's proprietary suite of ZEROED parts and accessories, as well as the legendary RIPSTOCK, the RESOLUTE is a rifle that’s never out of place, whether at the range, in the field, or as a reliable home defense option.

• Robust Construction: The receiver is crafted from durable aluminum, providing a lightweight yet incredibly strong foundation for the rifle. The exquisite Tungsten Gray Cerakote finish on both the receiver and handguard offers superior corrosion resistance, abrasion protection, and a distinctive aesthetic appeal that sets it apart from standard black rifles. This finish is not just for looks; it significantly enhances the rifle's durability in harsh environments.
• CMMG ZEROED Accessories: This rifle comes equipped with CMMG's thoughtfully designed ZEROED components, which enhance usability and control:
  • CMMG ZEROED Muzzle Brake: This brake, with its 5/8"x24 thread pattern, is optimized to reduce recoil and muzzle rise, allowing for faster follow-up shots and improved accuracy, especially beneficial when pushing the limits of long-range engagement.
  • Ambidextrous Safety Lever: Catering to both right and left-handed shooters, the ambidextrous safety ensures rapid and intuitive manipulation, improving responsiveness in dynamic situations.
  • Other ZEROED components like the ambidextrous charging handle, bolt catch, and forward assist further contribute to the rifle's ergonomic excellence and ease of operation.
• Black Nitride Barrel: The 16.10" barrel, made from high-quality Chrome Moly Steel, boasts a Black Nitride finish. This treatment enhances the barrel's surface hardness, corrosion resistance, and lubricity, leading to improved barrel life, easier cleaning, and consistent accuracy shot after shot. The threaded barrel design allows for easy attachment of muzzle devices.
• The CMMG RIPSTOCK: This 6-position adjustable stock is a hallmark of the RESOLUTE series. Engineered for rapid deployment, the RIPSTOCK features CMMG's proprietary FASTBACK™ technology, allowing for quick and positive adjustments to length of pull. Its robust synthetic material ensures durability, and its black finish complements the rifle's overall aesthetic. The ability to quickly adjust the stock makes it adaptable for different body types, shooting positions, and gear configurations.
• Ergonomic Grip: The rifle is fitted with a comfortable black polymer grip, providing a secure and non-slip hold for enhanced control and reduced shooter fatigue during extended sessions.
• CMMG EML 15 Handguard: The new EML 15 handguard is a testament to CMMG's commitment to modern design and functionality. It features M-LOK attachment slots at the 3, 6, and 9 o'clock positions, as well as an M-LOK section on top at the 12 o'clock. The omission of a full-length Picatinny section on top, common on older handguards, significantly reduces weight while still providing ample space for mounting essential accessories like lights, lasers, bipods, and sling attachments. This design contributes to the rifle's overall lightweight profile (6.40 lbs) and balanced feel.
• Semi-Automatic Action and Direct Impingement Operating System: The rifle operates on a reliable direct impingement system, a proven gas system known for its simplicity and accuracy in AR-style platforms. Its semi-automatic action allows for rapid follow-up shots, making it effective for various shooting disciplines.
• Magazine and Capacity: The rifle utilizes standard AR-15 type magazines and comes with a 10+1 capacity, making it suitable for compliance in various jurisdictions while still offering ample firepower for hunting and sport.

Performance Beyond Expectations

With an overall length of 32.50 inches, the RESOLUTE Mk4 is maneuverable and well-balanced, making it comfortable to shoot from various positions, whether standing, prone, or from a bench. The single-stage trigger provides a crisp and clean break, crucial for achieving precision accuracy, especially at longer ranges. While the rifle comes without iron sights, its Picatinny rail receiver allows for easy mounting of optics, which are essential for maximizing the 6mm ARC's long-range capabilities.

This rifle isn't just about impressive specifications; it's about the tangible benefits it delivers to the shooter. The combination of the advanced 6mm ARC cartridge, CMMG's precision manufacturing, and user-centric features results in a rifle that offers:

• Superior Accuracy: The optimized barrel, precise twist rate, and quality trigger contribute to consistent sub-MOA (Minute of Angle) accuracy potential with appropriate ammunition.
• Reduced Recoil: The efficient muzzle brake and the inherent characteristics of the 6mm ARC cartridge (compared to larger calibers) result in a very manageable recoil impulse, allowing for faster target re-acquisition and more comfortable shooting sessions.
• Reliability: CMMG's reputation for robust and dependable firearms is upheld in the RESOLUTE Mk4, ensuring consistent performance in diverse conditions.
• Adaptability: The M-LOK handguard and Picatinny top rail provide endless possibilities for customization, allowing shooters to tailor the rifle to their specific needs and preferences.

In summary, for those seeking the ultimate blend of AR-15 maneuverability and AR-10 ballistic performance, the CMMG RESOLUTE Mk4 6mm ARC rifle is an exceptional choice. Its careful design, premium components, and chambering in the cutting-edge 6mm ARC cartridge make it a top-tier contender for serious hunters, precision shooters, and anyone looking to elevate their AR-15 experience. It's a rifle built to perform, built to last, and built to truly let your rifle do the talking.

CMMG RESOLUTE Mk4 6mm ARC Specifications

Feature	Detail
Brand	CMMG
Model Series	Resolute Mk4
Caliber	6mm ARC
Action	Semi-Automatic
Operating System	Direct Impingement
Barrel Length	16.10"
Barrel Finish	Black Nitride
Barrel Material	Chrome Moly Steel
Muzzle Device	CMMG Zeroed Muzzle Brake
Thread Pattern	5/8"x24
Twist Rate	1:7.50"
Receiver Finish	Tungsten Gray Cerakote
Receiver Material	Aluminum
Handguard	EML 15 M-LOK (Tungsten Gray)
Stock	CMMG 6 Position RipStock
Stock Finish	Black
Grip	Black Polymer
Capacity	10+1
Magazine Type	AR-15
Overall Length	32.50"
Weight	6.40 lbs
Hand	Right Hand
Sights	None (Optic Ready)
Safety	Ambidextrous Lever
Trigger	Single-Stage
Gun Platform	AR-Style
SKU / MPN	60A10B5TNG
UPC	810097501317