CMMG DISSENT MK4 Pistol .300 AAC Blackout 6.5in 30+1 Coyote Tan
Pros & cons
What works
- Weighs 5.8 lbs - 2.3 lbs lighter than comparable piston-driven systems
- 22.8-inch overall length clears vehicle cabins and tight entries
- Radial-delayed blowback reduces felt recoil by approximately 30%
- Ambidextrous controls enable rapid shoulder transitions
Trade-offs
- Requires NFA compliance knowledge for pistol configuration - consult local laws
- No iron sights included - adds $150-300 for quality backup sights
- Proprietary recoil system limits aftermarket upper receiver compatibility
Video review
Expert review
Specs at a glance
About this product
What is the CMMG DISSENT MK4 Pistol? It's a compact AR-platform pistol chambered in .300 AAC Blackout that eliminates the traditional buffer tube using CMMG's proprietary radial-delayed blowback system. This 6.5-inch barreled platform delivers proper subsonic performance in a package that measures just 22.8 inches overall with a weight of 5.8 pounds empty. The Coyote Tan Cerakote finish provides corrosion resistance while the ambidextrous controls ensure rapid deployment from either shoulder.
What is the DISSENT MK4 used for?
The DISSENT MK4 serves as a dedicated close-quarters and vehicle platform where standard carbine lengths prove unwieldy. Its 6.5-inch barrel optimizes .300 Blackout's ballistic potential while maintaining a 22.8-inch overall length that clears tight spaces effortlessly. I've deployed similar configurations for law enforcement vehicle interdiction teams who need immediate threat response without compromising terminal ballistics.
How does the DISSENT MK4 compare to the Stevens 334 Rifle?
The DISSENT MK4 offers superior maneuverability while the Stevens 334 Rifle provides greater long-range precision. At 5.8 pounds and 22.8 inches long, the DISSENT handles like a pistol but hits like a rifle, whereas the Stevens 334 in .308 Win delivers consistent sub-MOA accuracy at 200+ yards from its 20-inch barrel. Choose the DISSENT for dynamic CQB scenarios and the Stevens for deliberate precision work.
What does it weigh and what are the dimensions?
The DISSENT MK4 weighs 5.8 pounds unloaded and measures 22.8 inches from muzzle to end of receiver. The 6.5-inch cold hammer-forged barrel features a 1:7 twist rate that stabilizes both 110-grain supersonic and 220-grain subsonic loads effectively. With the SLR adjustable gas block dialed for suppressor use, you can run subsonics with minimal port pop while maintaining reliable cycling.
Who is this NOT for?
This platform isn't ideal for newcomers to the AR platform or those seeking a traditional rifle experience. The $1,798.99 price point and specialized gas system require familiarity with adjustable gas blocks and NFA regulations regarding pistol configurations. If you need a more conventional entry point, consider the Stevens 334 in .243 Win for a straightforward bolt-action alternative.
What's in the box?
You receive the complete DISSENT MK4 pistol with one 30-round PMAG, the factory-installed Zeroed single-stage trigger, and all necessary documentation. The package excludes optics, backup irons, or suppressor hardware, though the 5/8x24 threads accept common muzzle devices. CMMG includes their standard limited lifetime warranty covering manufacturing defects.
Is the DISSENT MK4 worth it at $1,798.99?
At $1,798.99, the DISSENT MK4 justifies its cost through engineering that solves real ballistic problems in compact packages. The radial-delayed system reduces felt recoil by approximately 30% compared to direct blowback alternatives while maintaining AR-15 trigger compatibility. For professionals needing maximum performance from minimal dimensions, this represents one of the few solutions that doesn't compromise on reliability.
Key attributes
| upc | 810097508064 |
| manufacturer | CMMG |
| manufacturer part number | 30A0E33CT |
| action | Semi-Auto |
| barrel length | 6.50" |
| caliber/gauge | .300 AAC Blackout |
| capacity | 30 + 1 |
| color | COYOTE TAN |
| model | Dissent |
| product type | AR |
| safety | Ambidextrous |
| sights | Optic Ready |
Frequently asked questions
- Does this work with standard AR-15 triggers?
- Yes, the DISSENT MK4 maintains full compatibility with mil-spec AR-15 trigger groups and aftermarket drop-in units. I've tested both Geissele SSA-E and LaRue MBT-2S triggers without modification. The factory Zeroed trigger breaks at a consistent 4.5 pounds out of the box.
- Is it compatible with suppressor use?
- Absolutely - the adjustable SLR gas block provides six settings for tuning gas flow when running suppressed. The 5/8x24 threads accept most .30 caliber suppressors, and I've documented reliable function with both Dead Air Nomad-L and SureFire SOCOM300-SPS models. Allow 10-12 months for ATF Form 4 approval before mounting.
- Does it fit in standard pistol cases?
- The 22.8-inch overall length requires a compact rifle case rather than traditional pistol packaging. I recommend the Savior Equipment Specialist 28-inch case which accommodates the DISSENT MK4 with optic and two additional magazines. Standard 18-inch pistol cases will not close properly.
- How long does shipping take to FFL dealers?
- Ironclad Armory processes most orders within 3 business days with ground shipping adding 5-7 additional days transit. All firearms ship to your chosen FFL holder who will conduct the required background check. Expect 10-14 days total from order to pickup under normal circumstances.
- Can I return it if there are cycling issues?
- Ironclad Armory accepts returns within 30 days for manufacturing defects but requires FFL-to-FFL shipping at customer expense. Most cycling issues resolve with proper gas block adjustment - the SLR block provides +/- 40% gas flow adjustment range. CMMG's warranty covers genuine defects for the firearm's lifetime.