The CMMG DISSENT MK4 in 5.56mm redefines compact AR performance, integrating full AR-15 capability into a highly portable platform. Engineered for discreet carry and optimized maneuverability, this 10.5-inch system mitigates the conventional AR buffer system, relocating the entire action and recoil mechanism within the upper receiver. This design eliminates rearward extension, providing a significantly reduced footprint without compromising operational integrity or 5.56mm ballistic performance.
Key Features
CMMG Compact Action System
At the core of the DISSENT MK4 is CMMG’s patent-pending direct impingement Compact Action. This innovative system fully contains the action and recoil components within the upper receiver, rendering a buffer tube unnecessary. The result is a more compact, self-contained firearm, ideal for scenarios requiring a minimal overall length without sacrificing reliable function.
Optimized Gas Management
The integrated adjustable gas block allows for precise regulation of the gas system. This feature is critical for reliable operation across various ammunition types and for optimal performance when utilizing a suppressor. Users can fine-tune the gas flow to mitigate over-gassing or ensure consistent cycling, enhancing both reliability and shooter comfort.
TriggerTech AR-D Trigger Integration
Developed in collaboration with CMMG, the included TriggerTech AR-D trigger is specifically optimized for DISSENT firearms. This single-stage trigger provides a consistent 4 lb pull weight with a clean, repeatable break, facilitating enhanced precision and rapid target acquisition. Its robust design ensures reliable function within the DISSENT platform.
Compact Platform Utility
The 10.5-inch barrel length provides an advantageous balance of ballistic performance for the 5.56mm cartridge and a highly maneuverable form factor. This configuration is engineered for operators requiring a compact primary weapon for confined spaces, vehicle operations, or discreet transport, while maintaining the operational familiarity and accessory compatibility of the AR-15 system.
Technical Specifications
- Caliber: 5.56x45mm NATO (.223 Rem Compatible)
- Barrel Length: 10.5 inches
- Action Type: Direct Impingement Compact Action
- Trigger: TriggerTech AR-D (4 lb pull weight)
- SKU: RSR|CMMG55A8D40-AB









