The CMMG RESOLUTE MK4 22 ARC 16.1" Tungsten (Model 28A670CTNG, UPC 810148627102) is a modern AR-15 carbine built for shooters who want next-generation .22 caliber performance in a reliable, feature-rich platform. Chambered in the innovative 22 ARC, this rifle delivers 22-250-level ballistics from a standard AR-15-sized package, making it an outstanding choice for hunting, long-range steel, and practical rifle work.
With a 16.10" black nitride threaded barrel, Tungsten Cerakote receiver, M-LOK handguard, and CMMG 6-position RipStock, the RESOLUTE MK4 22 ARC 28A670CTNG blends premium components into a lightweight, accurate, and highly adaptable rifle.
22 ARC – Modern .22-Caliber Performance from an AR-15
The star of this rifle is the 22 ARC chambering, designed by Hornady to bring serious downrange performance to the AR-15 platform:
Caliber: 22 ARC (.22 Advanced Rifle Cartridge)
Designed to provide 22-250 Remington–like ballistics in an AR-15-length action.
Flat-shooting, high-BC bullets excel at medium- to long-range shooting, hunting, and precision work.
If you want more reach and wind performance than 5.56 without jumping to a heavier AR-10, the RESOLUTE MK4 in 22 ARC hits the sweet spot.
16.1" Black Nitride Threaded Barrel – Ready for Muzzle Devices
This RESOLUTE MK4 model features a 16.10" barrel, optimized for velocity and handling:
16.10" barrel length balances maneuverability with excellent ballistic performance.
Black nitride finish improves corrosion resistance and barrel life while making cleaning easier.
Threaded muzzle (typically 5/8x24) ships with a muzzle brake, allowing easy upgrades to suppressors or different brakes/compensators.
Fast 1:7.5" twist (approx.) stabilizes modern, high-BC .22 bullets for long-range stability.
Whether you’re shooting from a bench, prone, or on the move, this barrel is made to deliver consistent accuracy and repeatable hits.
Tungsten Cerakote Receiver & Modern M-LOK Handguard
The 28A670CTNG stands out visually and functionally with its premium finish and furniture:
Tungsten Cerakote on the upper and lower receiver for a durable, weather-resistant, and modern gray finish.
Lightweight free-float M-LOK handguard lets you mount bipods, grips, lights, and other accessories exactly where you want them while helping maintain accuracy.
Full-length Picatinny top rail for easy optic mounting—red dots, LPVOs, or traditional scopes all drop right in.
This combination gives the rifle a sleek, tactical look along with the durability and modularity serious shooters expect.
10+1 Semi-Auto AR-15 Platform – MK4 Lower
Built on CMMG’s proven MK4 (AR-15 pattern) platform, this RESOLUTE offers familiar controls and compatibility:
Capacity: 10+1 rounds (10-round magazine, plus one in the chamber), compliant with stricter-capacity regions.
Semi-automatic action for fast follow-up shots and effective target engagement in hunting and practical shooting.
Standard AR-15 controls (mag release, bolt catch, safety) for intuitive handling, especially if you’re already familiar with the platform.
You get the modularity of an AR-15 combined with a cutting-edge cartridge and CMMG’s refined build quality.
CMMG 6-Position RipStock & Black Polymer Furniture
Comfort and control matter—CMMG outfits this rifle with their well-regarded RipStock and ergonomic furniture:
CMMG 6-position RipStock allows rapid length-of-pull adjustments without searching for a release lever—just “rip” to extend.
Black synthetic stock and black polymer grip provide a solid, no-nonsense interface that stands up to field use and training.
This setup keeps the rifle quick to shoulder, comfortable for different shooters, and easy to configure with gear or clothing layers.
User-Friendly Trigger & Ambidextrous Features
CMMG designs the RESOLUTE line to run hard but feel refined:
Single-stage trigger tuned for a clean, predictable break—ideal for precise shots at distance as well as rapid follow-ups.
Ambidextrous safety selector makes the rifle more accessible to left-handed shooters and more flexible for positional work.
These features help the 22 ARC RESOLUTE feel like a purpose-built precision carbine, not just another basic AR.
Ideal Uses – From Varmints to Steel at Distance
The CMMG RESOLUTE MK4 22 ARC 16.1" Tungsten is perfect for shooters who want a versatile, accurate AR:
Varmint & predator hunting – Flat-shooting 22 ARC excels on coyotes and mid-size predators at extended ranges.
Long-range target & steel – High-BC .22 bullets stay supersonic farther, giving you predictable trajectories for steel matches or informal long-range days.
Practical/tactical training – AR-15 ergonomics with more reach than 5.56, making it excellent for honing skills beyond 300+ yards.
If you’ve been thinking about stepping into 22 ARC and want a turn-key, factory-built rifle, this RESOLUTE configuration is a strong contender.
Key Specs – CMMG RESOLUTE MK4 22 ARC 16.1" TUNG (28A670CTNG)
Manufacturer: CMMG, Inc.
Model: RESOLUTE MK4 22 ARC 16.1"
SKU / MPN: 28A670CTNG
UPC: 810148627102
Caliber: 22 ARC (.22 Advanced Rifle Cartridge)
Action: Semi-automatic, AR-15 MK4 platform
Capacity: 10+1 rounds
Barrel Length: 16.10" black nitride, threaded, approx. 1:7.5" twist
Finish: Tungsten Gray Cerakote receiver; black nitride barrel
Handguard: Free-float M-LOK handguard with top Picatinny rail
Stock: CMMG 6-position RipStock, black synthetic
Grip: Black polymer grip
Muzzle Device: Factory muzzle brake (on threaded barrel)
Features: Ambidextrous safety, single-stage trigger, optics-ready flat-top upper
If you’re ready to move beyond 5.56 and tap into the flat-shooting, long-range potential of 22 ARC, the CMMG RESOLUTE MK4 22 ARC 16.1" Tungsten 28A670CTNG (UPC 810148627102) delivers a feature-packed, optics-ready rifle that’s built for precision, reliability, and modern AR versatility.
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