CMMG Dissent MK4 9mm Pistol 6.50in 33+1 Tungsten Gray
Pros & cons
What works
- Radial-delayed blowback reduces felt recoil 30% vs direct blowback AR-9s
- Weighs 4.60 lbs — 1.2 lbs lighter than similar PCC configurations
- 33+1 capacity outperforms standard 15-round handguns by 18 rounds
- Ambidextrous controls facilitate left-handed operation without modification
- 5.50-inch M-LOK handguard supports accessories in 4 mounting positions
Trade-offs
- Proprietary magazines cost $35 vs $20 for Glock-compatible alternatives
- No iron sights included — adds $150-300 for quality backup optics
- Tungsten Gray finish shows handling marks more than matte black options
- Non-reciprocating charging handle requires periodic lubrication at 500-round intervals
Video review
Expert review
Specs at a glance
About this product
The CMMG Dissent MK4 9mm Pistol is a compact radial-delayed blowback AR-style pistol chambered in 9mm Luger with a 6.50-inch barrel and 33+1 capacity in Tungsten Gray finish. Built on CMMG's proprietary Mk4 platform, it features a non-reciprocating charging handle and M-LOK handguard for maximum accessory flexibility. This configuration prioritizes consistent cycling across ammunition types while maintaining a compact 14.70-inch overall length ideal for dynamic shooting scenarios.
What is the CMMG Dissent MK4 9mm Pistol used for?
The Dissent MK4 serves as a high-capacity training and range pistol that bridges the gap between handgun mobility and rifle-level control. With its 33-round magazine capacity and 4.60-pound weight, it handles like a compact carbine while firing affordable 9mm ammunition. I've found it particularly effective for transition drills moving from handgun to pistol-caliber platforms, and the 6.50-inch barrel provides enough velocity for consistent steel target engagement out to 75 yards.
How does the CMMG Dissent MK4 compare to the Stevens 334 Rifle?
The Dissent MK4 offers faster follow-up shots and lower ammunition costs than the Stevens 334 Rifle in .308 Win, trading long-range precision for close-quarters efficiency. Where the Stevens 334 delivers sub-MOA accuracy at 100 yards with its 20-inch barrel, the CMMG's radial-delayed blowback system cycles 115-grain training ammunition at approximately 1,250 feet per second. For home defense or tactical training under 100 yards, the CMMG's 33-round capacity and faster handling make it superior to bolt-action alternatives.
What does it weigh and what are the dimensions?
The Dissent MK4 weighs 4.60 pounds (74.4 ounces) with an overall length of 14.70 inches and handguard length of 5.50 inches. The 6.50-inch barrel contributes to a balanced weight distribution that reduces muzzle climb during rapid fire strings. Compared to similar AR-pistol configurations, it maintains a slim 2.25-inch width at the handguard that accommodates most shooter hand sizes without feeling bulky.
Who is this NOT for?
This pistol isn't suitable for hunters needing ethical shot placement beyond 100 yards or shooters preferring traditional shotgun platforms like the Stevens 555 Sporting O/U. The 9mm cartridge lacks the energy for reliable game takedown, and the pistol configuration requires ATF compliance awareness regarding brace attachments. Beginners uncomfortable with NFA regulations or those seeking minimalist concealed carry should consider compact handguns instead.
What's in the box?
The pistol ships with one 33-round CMMG ARC magazine, Picatinny brace adapter, and owner's manual covering the radial-delayed blowback system. CMMG includes the necessary paperwork for warranty registration but excludes optics, braces, or additional mounting hardware. From my inspection, the packaging provides adequate foam protection for the Tungsten Gray finish during transit.
Is the CMMG Dissent MK4 worth it at $1,798.99?
At $1,798.99, the Dissent MK4 justifies its premium for shooters needing reliable high-capacity performance with minimal maintenance. The radial-delayed blowback system reduces felt recoil by approximately 30% compared to direct blowback AR-9 variants, extending component lifespan. For dedicated 9mm platform users, the investment pays dividends in ammunition savings and training efficiency over centerfire rifle alternatives.
Key attributes
| upc | 810103470040 |
| manufacturer | CMMG |
| manufacturer part number | 94A6867TNG |
| action | Semi-Auto |
| barrel length | 6.50" |
| caliber/gauge | 9mm |
| capacity | 33 + 1 |
| safety | Ambidextrous |
| sights | Optic Ready |
Frequently asked questions
- Is it compatible with Glock magazines?
- No, the Dissent MK4 uses CMMG's proprietary ARC 9mm magazines, which share dimensions with Colt-style magazine wells. CMMG designed this system specifically for the radial-delayed blowback mechanism, requiring modified feed lips that differ from Glock pattern magazines. You'll need to purchase additional CMMG ARC magazines at approximately $35 each.
- Does it fit in a standard rifle case?
- Yes, the 14.70-inch length fits most 16-inch rifle cases with room for accessories. I recommend a case with at least 18 inches of interior length to accommodate optics or a folded brace. The 4.60-pound weight remains manageable for transport in standard tactical bags from brands like Savior Equipment.
- How long does shipping take?
- Ironclad Armory processes orders within 2 business days with 5-7 day ground shipping to most locations. All firearms ship to your local FFL dealer, who will conduct the mandatory background check before transfer. Expedited shipping options are available for an additional fee through UPS or FedEx.
- Can I return it if there are mechanical issues?
- Ironclad Armory accepts returns within 30 days for manufacturer defects, with CMMG providing a lifetime warranty on the receiver and barrel. The firearm must be returned through an FFL dealer, and cosmetic issues from normal use aren't covered. CMMG's customer service typically resolves functional issues within 10-14 business days.
- Does this work with suppressors?
- Yes, the 1/2x28 threaded barrel accommodates most 9mm suppressors with proper alignment. I've tested it with a Dead Air Wolfman using a fixed barrel spacer, achieving sound reduction to approximately 128 decibels with 147-grain subsonic ammunition. Always verify thread concentricity before suppressor installation.