CMMG Dissent MK4 5.56×45 NATO 16.1in Armor Black
Pros & cons
What works
- Adjustable gas block with 12 settings — eliminates need for $200 gunsmith work
- Folds to 26.8 inches — 33% shorter than standard AR-15 for storage
- Side charging handle non-reciprocating — prevents hand injuries during rapid fire
Trade-offs
- Weight 7.2 lb unloaded — 1.3 lb heavier than basic M4 carbines
- No iron sights included — adds $100-$200 for backup sights
- Premium price at $2089 — $1000 more than entry-level AR-15 rifles
Video review
Expert review
Specs at a glance
About this product
The CMMG Dissent MK4 is a 16.1-inch barreled AR-pattern rifle chambered in 5.56x45mm NATO with a side-folding stock and non-reciprocating side charging handle, designed for shooters who demand mechanical reliability and regulatory compliance in a modular platform. It features an adjustable gas block for suppressor use and a 15-inch M-LOK handguard for accessory mounting. At $2089.99, it occupies the premium end of the modern sporting rifle market with features typically found on custom builds.
What is the CMMG Dissent MK4 used for?
The CMMG Dissent MK4 is built for range training, home defense configurations, and suppressor-ready applications where modularity and reliability are non-negotiable. Its 16.1-inch barrel provides optimal velocity for 5.56mm ammunition while remaining NFA-compliant without tax stamp paperwork. The folding stock and adjustable gas system make it ideal for storage in vehicles or tight spaces and allow quick tuning for suppressed fire.
How does the CMMG Dissent MK4 compare to the Stevens 334 Rifle in .308 Win?
The Dissent MK4 offers semi-automatic operation and modular AR-platform compatibility, while the Stevens 334 in .308 Win is a bolt-action rifle better suited for precision hunting. The CMMG fires 30 rounds in 10 seconds with minimal recoil, whereas the Stevens delivers superior long-range accuracy with match-grade ammunition but requires manual cycling. For tactical scenarios or high-volume training, the Dissent is clearly superior; for ethical hunting past 300 yards, the Stevens wins.
What does it weigh and what are the dimensions?
Unloaded weight is 7.2 pounds (3260 grams), with an overall length of 35.5 inches extended and 26.8 inches folded. The 16.1-inch barrel has a 1:7 twist rate optimized for stabilizing 62-grain and heavier projectiles. This makes it 1.3 pounds heavier than a typical M4-profile carbine but balances better when fitted with a suppressor or optic.
Who is this NOT for?
This rifle is not for beginners on a tight budget or hunters seeking lightweight portability. The $2089.99 price point exceeds entry-level AR-15s by over $1000, and the 7.2-pound weight is substantial for extended carry. If you need a simple, reliable shotgun for clays or bird hunting, consider the Stevens 555 Sporting O/U instead.
What's in the box?
You receive the complete rifle, two 30-round PMAGs, a cleaning kit, and the CMMG ZEROED muzzle brake installed. The package weighs 14 pounds shipped, with all necessary paperwork and a warranty card. No optics or sling are included — plan another $300-$600 for those essentials.
Is the CMMG Dissent MK4 worth it at $2089.99?
Yes, if you require a suppressor-ready, folding-stock AR with premium features out of the box. The adjustable gas block alone saves $200 in gunsmithing costs, and the side-charging handle is a $150 upgrade on most rifles. For comparison, building a similar rifle from parts would cost $1800-$2200 and require technical assembly. If you don’t need these features, a standard AR at $900 will suffice.
Key attributes
| upc | 810103479487 |
| manufacturer | CMMG |
| manufacturer part number | 55A1A0BAB |
| barrel length | 16.10" |
| caliber/gauge | .223 REM/5.56 NATO |
| capacity | 30 + 1 |
| safety | CMMG Zeroed 60/90 Degree |
Frequently asked questions
- Is it compatible with standard AR-15 magazines?
- Yes, it accepts any mil-spec AR-15 magazine including PMAGs and USGI aluminum. The included Magpul PMAGs have a 30-round capacity and work flawlessly with the enhanced mag release.
- Does it fit in a standard rifle case?
- With the stock folded, it fits in a 28-inch case, saving 8.7 inches of length. Full extended length requires a 36-inch case. I recommend Pelican 1750 for maximum protection.
- How long does shipping take to Montana?
- FFL shipments take 3-5 business days once processing is complete. All rifles require signed delivery at your licensed dealer per ATF regulation 27 CFR 478.124.
- Can I return it if it doesn't cycle properly?
- Returns are accepted within 30 days for mechanical defects, but must go through an FFL. Most cycling issues are resolved by adjusting the gas block — full instructions are in the manual.
- Does this work with a SureFire SOCOM suppressor?
- Yes, the 1/2x28 threads accept SureFire SOCOM muzzle devices directly. The adjustable gas block has 12 settings to tune for backpressure — start at position 4 for suppressed fire.