The CMMG DISSENT MK4 .338 ARC 6.5in AR Pistol 10-Round is a compact, semi-automatic pistol that rethinks the AR platform by housing the entire recoil system in the upper receiver. This eliminates the buffer tube, giving you a shorter, more maneuverable firearm ideal for range shooting and short-barrel applications. Chambered in .338 ARC with a 6.5-inch barrel, it ships with one 10-round magazine and is finished in black Cerakote for durability.
| Specification | Detail |
|---|---|
| Manufacturer | CMMG |
| Model | DISSENT MK4 |
| Material | Aluminum upper/lower receiver, steel barrel |
| Compatibility | .338 ARC ammunition |
| Finish | Black Cerakote |
| Weight | Per manufacturer specs: 5.2 lbs |
| Condition | New |
Key Features
- Compact Action Design: CMMG’s patent-pending system fits the recoil assembly entirely in the upper receiver, so there’s no buffer tube. Why it matters: This makes the pistol shorter and easier to handle for shooters with smaller frames or those who want a truly compact AR pistol.
- 6.5-Inch Barrel: The chrome-moly steel barrel is sized for maneuverability while still delivering solid accuracy at typical pistol ranges. Why it matters: You get a barrel that’s short enough for close-quarters use but long enough to keep velocity and precision for target shooting.
- .338 ARC Chambering: A versatile cartridge that offers good energy and moderate recoil, making it suitable for new shooters and experienced enthusiasts alike. Why it matters: You can shoot a round that’s effective for both range practice and defensive training without punishing recoil.
- Cerakote Finish: The black Cerakote coating resists wear, corrosion, and scratches. Why it matters: Your pistol stays looking good and performing reliably even after repeated trips to the range or outdoor exposure.
- 10-Round Magazine: Ships with one 10-round magazine, keeping the package compliant with many state laws while still giving you enough capacity for a full shooting session. Why it matters: You can start shooting right away without needing to buy extra magazines.
Who It’s For
This pistol is built for families who want to introduce new shooters to the AR platform without the intimidation of a full-length rifle. It’s also great for experienced shooters looking for a compact, lightweight pistol for range fun or training. The short barrel and bufferless design make it especially friendly for youth shooters and those with smaller hands.
Pros & Cons
- Pros: Compact, bufferless design for easy handling; durable Cerakote finish; low-recoil .338 ARC round suitable for beginners; 10-round magazine meets many state laws.
- Cons: The 6.5-inch barrel limits long-range accuracy compared to longer barrels, so it’s best for distances under 100 yards. Also, .338 ARC ammunition is less common than .223 or 9mm, so you may need to order online.
How It Compares
| Feature | CMMG DISSENT MK4 .338 ARC | Zev Technologies OZ9C | Agency Arms AOS Glock 19 |
|---|---|---|---|
| Caliber | .338 ARC | 9mm | 9mm |
| Barrel Length | 6.5 inches | 4.49 inches | 4.02 inches |
| Action | Semi-auto, bufferless | Semi-auto, striker-fired | Semi-auto, striker-fired |
| Capacity | 10 rounds | 15+1 rounds | 15+1 rounds |
| Weight | 5.2 lbs | 1.7 lbs | 1.5 lbs |
| Finish | Black Cerakote | Black nitride | Black nitride |
| Best For | Compact AR pistol, new shooters | Concealed carry, competition | Duty, concealed carry |
Frequently Asked Questions
What is the effective range of the CMMG DISSENT MK4 .338 ARC 6.5in AR Pistol?
With the 6.5-inch barrel, you can expect reliable accuracy out to about 75-100 yards for paper targets and steel. The .338 ARC is not designed for long-range precision, but it’s plenty capable for typical range distances and close-quarters training.
Is this pistol legal in all 50 states?
The 10-round magazine helps it comply with many state restrictions, but you should always check your local laws regarding pistol length, barrel length, and magazine capacity. We ship nationwide, but it’s your responsibility to confirm legality in your state.
Can I use this for home defense?
Yes, the .338 ARC is a moderate-recoil round that can be effective for home defense, and the compact size makes it easy to maneuver in tight spaces. Just be aware that overpenetration can be a concern with any rifle cartridge, so practice with defensive loads and consider your home’s layout.
Does it come with any accessories?
It ships with one 10-round magazine and the pistol itself. No additional accessories like optics, sights, or cases are included. You can add those separately to customize it to your needs.
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Last updated: April 2026
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This CMMG DISSENT MK4 .338 ARC 6.5in AR Pistol 10-Round is ideal for shooters looking to buy guns online with confidence. Built with precision engineering and tested performance, it’s a top-tier choice whether you're looking for home defense, sport shooting, or a trusted everyday carry.
Why Choose the CMMG DISSENT MK4 .338 ARC 6.5in AR Pistol 10-Round?
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