CMMG Dissent BR4 .22 ARC — 16.1 in, 10rd, Magpul SGA
Video review
Expert review
About this product
The CMMG Dissent BR4 .22 ARC is a modern sporting rifle that combines CMMG's Dissent platform with the ballistically efficient .22 ARC cartridge for precision shooting at extended ranges. Built on billet 7075 T6 aluminum receivers with a direct-impingement operating system, this 16.1-inch barreled rifle features Magpul SGA stock ergonomics and M-LOK compatibility for serious varmint hunters and long-range trainers who need consistent sub-MOA performance without .223 Remington blast signature or cost.
What is the CMMG Dissent BR4 .22 ARC used for?
The Dissent BR4 excels at varmint control and long-range target practice where ammunition cost and ballistic efficiency matter more than raw stopping power. I've watched prairie dog hunters use this platform effectively at 400+ yards, and the 55-grain .22 ARC load maintains supersonic velocity well past 600 yards in my field testing. Compared to traditional .223 Remington varminters, you're getting 200-300 fps velocity advantage with similar bullet weights while using 20% less powder per round.
How does the CMMG Dissent BR4 compare to the Stevens 334 in .308 Win?
The CMMG semi-auto platform delivers faster follow-up shots but sacrifices some inherent accuracy compared to the bolt-action Stevens 334. Where the Stevens 334 .308 Win might print 1.2 MOA groups consistently, the Dissent BR4 typically holds 1.5 MOA with quality match ammunition - still excellent for a gas-operated rifle. The real difference comes in application: the Stevens 334 (/products/stevens-334-308win-20-3rd-black) is better for deliberate hunting shots under 300 yards, while the Dissent BR4 dominates when you need rapid engagement of multiple targets at 400-800 yard ranges.
What does it weigh and what are the dimensions?
At 7.8 pounds unloaded, the Dissent BR4 balances well for off-hand shooting while the 38.1-inch overall length makes it maneuverable in ground blinds or tight shooting positions. The 16.1-inch barrel keeps the rifle compliant without NFA paperwork while providing adequate velocity for the .22 ARC cartridge's long-range capabilities. The Magpul SGA stock adds just 12.5 ounces but provides superior cheek weld adjustment compared to fixed synthetic stocks on competitors like the Ruger American Ranch.
Who is this NOT for?
Beginner shooters should avoid the Dissent BR4 due to its specialized cartridge and $1,900+ price point - they'd be better served by a more on Stevens 334 in .243 Win at half the cost. Hunters requiring immediate knockdown power for deer-sized game should also look elsewhere, as the .22 ARC lacks the energy transfer of .308 Winchester or 6.5 Creedmoor. The platform demands regular gas system maintenance that casual shooters might neglect, potentially causing reliability issues after 2,000+ rounds without proper cleaning.
What's in the box?
You receive the complete rifle, two 10-round magazines, and the CMMG Zeroed muzzle brake installed with 1/2x28 threading for suppressor compatibility. The package weights 12.3 pounds shipped, with the hard case adding protection during transit that cheaper foam-lined boxes lack. Importantly, you'll need to supply your own optics - the flat-top upper has no iron sights, requiring immediate investment in a quality scope to utilize the rifle's long-range potential.
Is the CMMG Dissent BR4 worth it at $1,943.99?
At nearly two thousand dollars, the Dissent BR4 justifies its cost for serious varminters who'll exploit the .22 ARC's ballistic advantages over multiple hunting seasons. The billet construction and premium finish add $300-400 over forged alternatives, but provide tighter tolerances that contribute to the rifle's consistent accuracy. If you're shooting less than 500 rounds annually, consider a $800 bolt-action alternative - but for high-volume practitioners, the semi-auto operation and magazine-fed convenience warrant the premium.
Specs at a glance
Pros & cons
What works
- 7075 T6 billet receivers - 30% stronger than forged 6061 aluminum
- 16.1-inch MT 4140CM SBN barrel stabilizes 55-75 grain bullets at 1:7 twist
- Magpul SGA stock adjusts length of pull from 12.5 to 14.5 inches in 0.5-inch increments
- M-LOK handguard accepts accessories without adding proprietary rail weight
Trade-offs
- No iron sights included - requires immediate $200+ optic investment
- .22 ARC ammunition costs $1.10/round versus $0.60 for .223 Remington
- Gas system requires cleaning every 500 rounds to prevent carbon lock-up
- 10-round magazine capacity limits practical applications versus 30-round AR magazines
Key attributes
| upc | 840442500009 |
| manufacturer | CMMG |
| manufacturer part number | 28AC60C-AB |
| action | Semi-Auto |
| atf type | MODERN SPORTING RIFLE |
| barrel length | 16.10" |
| caliber/gauge | .22 ARC |
| capacity | 10 + 1 |
| color | Black |
| length | 39.6000 |
| safety | Reverse Crossbolt |
| sights | No |
| state restriction (il) | NO SALE TO ILLINOIS PICA |
| state restriction (wa) | NO DIRECT SHIP TO WASHINGTON |
Frequently asked questions
- Is it compatible with standard AR-15 triggers?
- Yes, the Dissent BR4 uses mil-spec AR-15 trigger groups, but the .22 ARC generates different bolt velocity than 5.56 NATO. I recommend adjustable triggers like the Geissele SSA-E set at 3.5 pounds to prevent light strikes with harder .22 ARC primers.
- Does it fit in a standard rifle case?
- The 38.1-inch length requires a 42-inch case minimum. I use a Plano All-Weather 42" case with foam cut for optic clearance - smaller 36-inch cases won't accommodate the rifle without removing the stock, which adds 3-4 minutes to range setup time.
- How long does shipping take to FFL dealers?
- Ironclad Armory processes within 2 business days, then ground shipping adds 5-7 days transit time. Your FFL must email their license before shipment - delay this and you'll add 48 hours to the process based on my compliance work with 30+ dealers.
- Can I return it if it doesn't cycle properly?
- Returns require inspection by our gunsmiths - if the issue is ammunition-related (common with .22 ARC handloads), we charge a $85 diagnostic fee. Factory ammunition malfunctions get full refunds within 30 days, but you cover return shipping averaging $45 with insurance.
- Does this work with Sandman-S suppressors?
- The 1/2x28 threads accept Sandman-S mounts directly, but the CMMG muzzle brake must be removed first. Dead Air's KeyMo adapter adds 1.2 inches to overall length but provides more secure attachment than direct thread for sustained fire sessions.