CMMG Dissent MK4 5.56 NATO 10.5" Upper Receiver
CMMG's innovative Dissent MK4 upper receiver features patent-pending Compact Action technology, left-side charging handle, and Picatinny rail end plate. Designed as a complete upper-only solution for AR-platform builds.
CMMG Dissent MK4 Upper Receiver: A New Approach to Compact AR Builds
The CMMG Dissent MK4 represents a thoughtful answer to the evolving regulatory landscape surrounding AR-platform pistol builds. Rather than relying on traditional stabilizing braces, CMMG engineered an entirely different solution: a complete upper receiver that houses the entire action and recoil assembly.
Key Features
- Patent-Pending Compact Action: CMMG's proprietary Radial Delayed Blowback system with fixed ejector keeps the action contained within the upper receiver
- Reduced Footprint: Less bulk and length than traditional AR pistols, without sacrificing functionality
- Left-Side Charging Handle: Non-reciprocating design allows quick bolt operation while maintaining sight picture
- 9.6" M-LOK Handguard: Provides ample rail space for accessories while keeping the profile compact
- Zeroed Blast Compensator: Factory-installed muzzle device helps manage recoil and blast
- Picatinny End Plate: Replaces the traditional buffer tube, allowing this upper to function as a standalone unit
- Armor Black Finish: Durable coating resists corrosion
What You Get
This is an upper receiver only—designed for shooters who understand AR-platform mechanics and want a modern, purpose-built solution. The Dissent MK4 represents genuine innovation in addressing the practical and legal considerations facing today's AR builders.
