CMMG Dissent MK4 22 ARC 16.1 in 10+1 Midnight Bronze
About this product
The CMMG Dissent MK4 22 ARC 16.1 in 10+1 Midnight Bronze is a bufferless semi-automatic rifle chambered in the high-velocity .22 ARC cartridge, built around CMMG's proprietary compact action system. This platform delivers AR-style ergonomics in a package that sidesteps traditional buffer tube limitations, featuring a non-reciprocating side charger and fully ambidextrous controls. The Cerakote Midnight Bronze finish on aluminum receivers provides both corrosion resistance and a distinctive appearance that stands apart from typical black rifles.
What is the CMMG Dissent MK4 used for?
This rifle is engineered for precision varmint control and medium-range target shooting where the .22 ARC's flat trajectory shines. The 16.1-inch barrel with 1:7 twist rate stabilizes heavy .22 caliber projectiles effectively for engagements out to 500 yards, while the 6.7-pound weight makes it manageable for extended field carry. Compared to bolt-action alternatives like the Stevens 334 in .308 Win, the Dissent MK4 offers faster follow-up shots while maintaining sub-MOA accuracy with quality ammunition.
How does the CMMG Dissent MK4 compare to traditional AR-15 platforms?
The Dissent MK4 significantly differs from standard AR-15s by eliminating the buffer tube entirely, reducing overall length by approximately 4 inches when folded. Where a typical AR-15 requires 7-8 inches of rearward space for bolt carrier travel, CMMG's radial delayed blowback system operates within the upper receiver alone. This makes the Dissent MK4 superior for vehicle deployment or storage, though it loses compatibility with aftermarket AR-15 stocks and requires proprietary magazines.
What does it weigh and what are the dimensions?
Unloaded weight sits at 6.7 pounds with an overall length of 35.55 inches extended, collapsing to 25.8 inches when the side-folding stock is engaged. The 16.1-inch cold hammer-forged barrel features a 1:7 twist rate optimized for stabilizing 60-80 grain .22 ARC projectiles, while the M-LOK handguard provides 13.5 inches of continuous accessory mounting surface. At 35.55 inches long, it's nearly 6 inches shorter than most Stevens 555 shotguns but offers superior long-range capability.
Who is this NOT for?
This rifle isn't suitable for beginners or budget-conscious shooters who haven't mastered fundamental marksmanship principles. The $2,089.99 price point places it well above entry-level options, and the .22 ARC cartridge currently costs approximately $1.10 per round versus $0.40 for .223 Remington. Hunters requiring immediate ammunition availability should consider more established calibers, as .22 ARC remains relatively niche compared to .223/5.56 or 6.5 Creedmoor.
What's in the box?
You receive the complete rifle with two CMMG 10-round magazines, owner's manual, and chamber flag. The muzzle brake comes pre-installed on 1/2-28 threads, though suppressor users should verify thread concentricity before mounting. Notably absent are any optics, sling attachments, or cleaning kits—plan for another $400-800 in essential accessories to make the rifle field-ready.
Is the CMMG Dissent MK4 worth it at $2,089.99?
At this price, the Dissent MK4 justifies its cost for shooters who specifically need the compact folding capability and .22 ARC's ballistic performance. The engineering investment in the bufferless system adds approximately $300-400 over comparable AR-15s, but delivers genuine functional advantages for tactical or confined-space use. For general-purpose shooting, a standard AR-15 platform offers better magazine compatibility and lower operating costs, but the Dissent MK4 occupies a unique niche that commands its premium.
Specs at a glance
Video review
Pros & cons
What works
- Bufferless design reduces overall length to 25.8 inches folded—4 inches shorter than collapsible AR-15s
- 6.7-pound weight balances well for off-hand shooting versus 8.5-pound precision ARs
- Non-reciprocating side charger allows clearance for large optics unlike traditional AR-15 charging handles
Trade-offs
- Proprietary magazines cost $35 each versus $15 for PMAGs—adds $100+ for a basic loadout
- .22 ARC ammunition averages $1.10/round compared to $0.40 for .223—triples practice costs
- No iron sights included—requires $150-400 optic investment before use
Expert review
Key attributes
| upc | 810148627218 |
| manufacturer | CMMG |
| manufacturer part number | 28A490FMB |
| action | Semi-Auto |
| atf type | MODERN SPORTING RIFLE |
| barrel length | 16.10" |
| caliber/gauge | .22 ARC |
| capacity | 10 + 1 |
| color | MULTI-COLOR |
| length | 39.8000 |
| safety | CMMG Zeroed 60/90 Degree |
| sights | No |
| state restriction (il) | NO SALE TO ILLINOIS PICA |
| state restriction (ri) | NO DIRECT SHIP TO RHODE ISLAND |
| state restriction (wa) | NO DIRECT SHIP TO WASHINGTON |
Frequently asked questions
- Is it compatible with standard AR-15 magazines?
- No, the .22 ARC chambering requires proprietary CMMG magazines due to different casing dimensions. The rifle ships with two 10-round magazines, and additional units cost approximately $35 each from CMMG directly or authorized dealers.
- Does it work with .223 Remington ammunition?
- Absolutely not—attempting to fire .223/5.56 in this rifle would cause catastrophic failure. The .22 ARC uses a larger case head and different pressure curve. Always verify cartridge designation on the barrel before loading.
- Can I mount a suppressor on the 1/2-28 threads?
- Yes, the muzzle brake uses standard 1/2-28 threading common to .22 caliber suppressors. I recommend checking thread concentricity with an alignment rod before shooting suppressed, as minor deviations can cause baffle strikes. Most quality cans from Dead Air or SilencerCo will interface properly.
- How long does shipping take to Montana?
- Firearms shipping to FFL dealers typically take 3-5 business days for processing plus 2-3 days transit via FedEx or UPS. Your local FFL will need to receive the firearm before you can complete the 4473 background check, adding another 1-2 days typically.