Product Overview
The CMMG DISSENT MK4 redefines the AR Personal Defense Weapon category through engineered compactness and operational versatility. This platform integrates CMMG’s proprietary Compact Action, containing the entire recoil system within the upper receiver, thereby eliminating the traditional buffer tube. This design decision significantly enhances portability and modularity, allowing for an exceptionally compact footprint without compromising AR-15 ergonomics or functionality.
Chambered in 300 Blackout, the DISSENT MK4 delivers substantial .30 caliber terminal performance from a suppressed or unsuppressed short-barrel system. Its robust construction and intelligent design cater to demanding applications requiring a potent, highly maneuverable firearm.
Key Features
Compact Action System
The core innovation of the DISSENT series, the patent-pending Compact Action, houses the complete recoil system within the upper receiver assembly. This eliminates the necessity for a buffer tube, greatly reducing overall length and facilitating diverse brace or stock configurations via the integrated 1913 Picatinny rear rail.
300 Blackout Optimization
This DISSENT MK4 is chambered in 300 Blackout, leveraging the cartridge’s effectiveness in short barrel applications. It offers a balance of ballistic performance and suppressed capability, making it highly effective for personal defense or specialized roles.
Enhanced Control Interface
Standard AR-15 ambidextrous controls ensure familiar and efficient manipulation. The forward non-reciprocating side charger provides a direct and ergonomic charging solution, reversible for either left or right-handed operators, optimizing cycling efficiency without shifting grip.
Integrated Modularity
A precision-machined 1913 Picatinny rail section at the rear of the lower receiver allows for direct attachment of a wide range of compatible braces, stocks, or other accessories, offering substantial customization potential to meet mission-specific requirements.
Technical Specifications
Firearm Details
- Model: CMMG Dissent MK4
- Caliber: 300 Blackout
- Barrel Length: 6.5 inches
- Capacity: 30 Rounds
- Action: CMMG Compact Action (Internal Recoil System)
- Controls: Ambidextrous AR-15 Standard, Forward Non-Reciprocating Side Charger (Reversible)
- Rear Interface: 1913 Picatinny Rail
- Muzzle Device: Muzzle Brake









