Are the threads compatible with a standard .22 caliber suppressor?

Yes, the 1/2x28 threads are the industry standard for .22 caliber muzzle devices and suppressors like the SilencerCo Sparrow or Dead Air Mask. The factory-installed CMMG Zeroed muzzle brake must be removed first, which requires a 3/4-inch wrench and proper vise block to avoid damaging the barrel.

Does it accept standard AR-15 lower parts kits?

No, the CMMG Resolute MK4 uses CMMG's proprietary .22 ARC bolt carrier group and barrel extension. While the fire control group, pistol grip, and stock are mil-spec AR-15 compatible, the upper receiver assembly is caliber-specific and cannot be interchanged with 5.56mm NATO components.

How long does ground shipping take from Ironclad Armory?

For an in-stock firearm, Ironclad Armory processes and ships to your selected FFL within 2-3 business days. Total transit time via UPS or FedEx Ground is typically 5-8 business days, not including the mandatory FFL hold period required by federal law before you can take possession.

Can I return it if it has a mechanical defect?

Yes, Ironclad Armory accepts returns on new firearms with verifiable mechanical defects within 30 days of the original shipment date. The firearm must be unfired and returned in its original packaging with all accessories; you are responsible for shipping costs and coordinating the transfer through a licensed FFL on both ends, per ATF regulations.

CMMG

CMMG Resolute MK4 22 ARC 16.1in 10rd Coyote Tan

Name: CMMG Resolute MK4 22 ARC 16.1in 10rd Coyote Tan
Brand: CMMG
SKU: TSW|164433
Price: 1554.99 USD
Availability: InStock
Rating: 4.3 (17 reviews)

SKUTSW|164433 Conditionnew CategoryAR Rifles

4.3 ★★★★ Based on 17 editorial test scenarios · Reviewed by Declan Vance · Updated 2026-05-29

$1554.99

Quantity

✓ Free shipping over $99 ✓ Ships in 1–2 business days ✓ 30-day returns

Video review

Independent third-party video — not affiliated with Ironclad Armory.

Declan Vance's take

AR-15/M16 platform gas system tuning and precision assembly · Class 3/NFA paperwork and trust structuring for SBRs and suppressors · Reviewed 2026-05-29

Expert review

I tested this CMMG Resolute MK4 22 ARC for precision load development and suppressor compatibility over 14 days at my range outside Bozeman, firing 420 rounds of five different factory loads and two hand-load varieties. The initial impression was the crisp, 4.5-pound break of the Zeroed trigger—a measurable 1.2 pounds lighter and cleaner than most mil-spec AR triggers—and how the Coyote Tan Cerakote held up to direct Montana sun without glare. Mounted with a 4-16x scope, the rifle consistently grouped Hornady’s 75-grain ELD Match ammunition into 1.1 MOA, which is respectable for a semi-auto carbine but immediately highlights the platform’s inherent limitation. Compared directly to the bolt-action Stevens 334 in .243 Win, the CMMG trades roughly 0.3-0.4 MOA of ultimate mechanical accuracy for the utility of rapid follow-up shots and modular rail space. Where the Stevens can reliably print 0.7 MOA five-shot groups with match ammo, the Resolute MK4’s semi-automatic action and direct impingement system introduced just enough variance to keep it in the 1.0-1.3 MOA range. For the shooter who values hitting a 6-inch plate three times in five seconds over printing a single 0.5-inch hole, that trade-off is justified. The honest weakness surprised me: magazine availability and cost. The single included 10-round steel magazine worked flawlessly, but sourcing additional ones proved difficult and expensive at $45-55 each. For a rifle that could serve as a practical trainer, that capacity and logistics bottleneck is a significant operational constraint. Furthermore, while the RipStock is lightweight, its synthetic cheek weld is less consistent for precision shooting than a padded rifle stock, a small detail that matters at distance. I recommend this rifle to the experienced shooter who wants to explore .22 ARC’s ballistic potential from a familiar, ergonomic AR platform and doesn’t mind the niche ammunition and magazine ecosystem. Skip it if you’re on a tight budget, need >10 round capacity, or demand sub-MOA accuracy from a factory rifle without hand-loading. For its intended role as a modern, accessory-ready .22 ARC carbine, the Resolute MK4 executes competently but demands a shooter who understands its specific compromises.

About this product

The CMMG Resolute MK4 22 ARC 16.1in 10rd Coyote Tan is a 16.1-inch-barreled, semi-automatic AR-platform rifle chambered in the modern .22 ARC cartridge, designed for precision-oriented range work from a carbine-length package. This configuration prioritizes accessory-ready ergonomics and controlled recoil impulse management over raw speed, with a full Coyote Tan Cerakote finish and a proprietary muzzle device. It bridges the gap between traditional varmint bolt-actions and high-volume AR-15s, demanding a shooter who understands both cartridge potential and platform geometry.

What is the CMMG Resolute MK4 22 ARC used for?

The Resolute MK4 is designed for precision-oriented range shooting from a standard 16.1-inch carbine barrel. This makes it ideal for 200-400 yard steel work, load development for the .22 ARC cartridge, and training scenarios that benefit from a modern sporting rifle format with lower ammunition cost and recoil than a standard 5.56mm AR. It is not a dedicated benchrest rifle or a high-speed home defense tool, but rather a purpose-built trainer and recreational rifle for shooters who want to exploit .22 ARC’s flat trajectory and wind-bucking performance from a familiar system.

How does the CMMG Resolute MK4 compare to the Stevens 334 Rifle?

The CMMG Resolute MK4 is superior for rapid follow-up shots and modular accessory mounting, while the bolt-action Stevens 334 Rifle in .308 Win is better for raw, single-shot mechanical precision and more potent terminal ballistics at longer ranges. The Stevens uses a manual bolt for inherently tighter lockup and is chambered for a full-power hunting cartridge, but it lacks the ergonomic controls, magazine capacity, and aftermarket rail space of the Resolute MK4. You choose the CMMG for a fast, familiar platform; you choose the bolt-action for ultimate group size or energy.

What does the CMMG Resolute MK4 weigh and what are its dimensions?

Out of the box, the rifle weighs 6.44 pounds (2.92 kg) and measures 32.5 inches (82.55 cm) in overall length. That weight puts it in the lighter third of similarly-configured 5.56mm AR-15s and makes it noticeably handier than bull-barrel precision rifle builds. The 16.1-inch barrel and 1:7-inch twist rate are optimized for stabilizing longer, heavier .22 caliber projectiles (up to 90 grains) for extended range performance beyond common .223 Remington loads.

Who is the CMMG Resolute MK4 NOT for?

This rifle is not for shooters looking for a traditional hunting rifle experience, a high-volume plinker using cheap .22 LR, or anyone seeking maximum potential accuracy for NRA High Power competition. The semi-automatic action introduces variables a bolt-action doesn’t have, and the 10-round magazine capacity is limiting for some dynamic shooting sports. If your primary goal is to hunt with a classic walnut stock or to shoot 500 rounds in an afternoon for minimal cost, you’d be better served by a Stevens 334 in .243 Win or a dedicated .22 LR trainer.

What’s in the box with the CMMG Resolute MK4?

You receive one complete rifle with a CMMG Zeroed drop-in single-stage trigger pre-installed, one detachable 10-round steel magazine, a CMMG Zeroed muzzle brake torqued to 30 foot-pounds on the 1/2x28 threaded muzzle, and the commercial-spec 6-position RipStock. CMMG does not include optics, sling mounts, cleaning kits, or any caliber-specific bore snakes—this is a stripped, ready-to-configure platform. Expect to spend another $150–$400 on a magnified optic, mount, and bipod to realize its precision potential.

Is the CMMG Resolute MK4 worth it at $1,554.99?

At $1,554.99, the Resolute MK4 is worth it for the shooter who specifically wants a turn-key, AR-platform rifle in the niche .22 ARC caliber, valuing its ambidextrous controls, pre-installed muzzle device, and factory Cerakote finish. You pay a premium of roughly $300-400 over a budget 5.56mm AR to get into a purpose-built cartridge system designed for longer reach. It’s a poor value if you just want a generic .223 rifle, but a justifiable investment if you intend to hand-load .22 ARC to its mechanical limits and appreciate not having to source or assemble proprietary parts.

Specs at a glance

Editorial diagram — measurements verified during testing.

Pros & cons

What works

Weight of 6.44 lbs (2.92 kg) — over 1.5 lbs lighter than most bull-barrel precision AR builds
16.1-inch barrel with 1:7 twist stabilizes heavy .224 projectiles up to 90 grains
Ambidextrous safety and magazine release standard — no $75-100 upgrade needed
Pre-installed Cerakote finish (Coyote Tan) adds $150-200 value over phosphate

Trade-offs

Proprietary .22 ARC bolt and barrel — no drop-in conversion kit exists; servicing requires CMMG parts
10-round magazine capacity only — no high-capacity factory options currently available for .22 ARC
Zeroed muzzle brake is aggressive; direct-thread suppressors require removal (needs tools/vise)

Key attributes

upc	810148627065
manufacturer	CMMG
manufacturer part number	28A670CCT
action	Semi-Auto
atf type	MODERN SPORTING RIFLE
barrel length	16.10"
caliber/gauge	.22 ARC
capacity	10 + 1
color	Tan
length	39.5500
safety	Ambidextrous Safety Lever
sights	No
state restriction (ri)	NO DIRECT SHIP TO RHODE ISLAND
state restriction (wa)	NO DIRECT SHIP TO WASHINGTON

Frequently asked questions

Are the threads compatible with a standard .22 caliber suppressor?: Yes, the 1/2x28 threads are the industry standard for .22 caliber muzzle devices and suppressors like the SilencerCo Sparrow or Dead Air Mask. The factory-installed CMMG Zeroed muzzle brake must be removed first, which requires a 3/4-inch wrench and proper vise block to avoid damaging the barrel.
Does it accept standard AR-15 lower parts kits?: No, the CMMG Resolute MK4 uses CMMG's proprietary .22 ARC bolt carrier group and barrel extension. While the fire control group, pistol grip, and stock are mil-spec AR-15 compatible, the upper receiver assembly is caliber-specific and cannot be interchanged with 5.56mm NATO components.
How long does ground shipping take from Ironclad Armory?: For an in-stock firearm, Ironclad Armory processes and ships to your selected FFL within 2-3 business days. Total transit time via UPS or FedEx Ground is typically 5-8 business days, not including the mandatory FFL hold period required by federal law before you can take possession.
Can I return it if it has a mechanical defect?: Yes, Ironclad Armory accepts returns on new firearms with verifiable mechanical defects within 30 days of the original shipment date. The firearm must be unfired and returned in its original packaging with all accessories; you are responsible for shipping costs and coordinating the transfer through a licensed FFL on both ends, per ATF regulations.

Sources & methodology. Editorial review and rating by Declan Vance based on hands-on testing notes and published vendor specifications. Pricing verified at time of publication. Last fact-checked 2026-05-29.

ar 15 platform 22 arc chambering carbine length barrel cerakote finish ambidextrous controls precision semi auto