The CMMG Dissent MK4 Complete Upper Receiver 5.56x45mm 10.5″ Threaded Barrel Sniper Gray Cerakote Made a Bold First Impression
The CMMG Dissent MK4 Complete Upper Receiver 5.56x45mm 10.5″ Threaded Barrel Sniper Gray Cerakote isn’t just another AR-15 upper; it’s a statement. It’s a bold declaration that you’re not willing to compromise on performance or adaptability, even in the face of shifting legal landscapes. This unique upper promises a compact, buffer tube-less AR pistol build, offering a fresh take on a classic platform, and I was eager to see if it lived up to the hype.
My interest in the CMMG Dissent stemmed from a desire for a truly compact and maneuverable 5.56 platform. I’ve always appreciated the AR platform’s modularity but found the traditional buffer tube limiting for certain applications, like vehicle carry or discreet storage. The promise of a self-contained upper that eliminated this constraint was incredibly appealing.
Unboxing the Dissent was an experience in itself. The Sniper Gray Cerakote finish is immediately striking, providing a professional and durable appearance. The build quality feels solid and the attention to detail is evident, from the precisely machined receiver to the cleanly threaded barrel.
I considered options like the BRN-180 upper or building a traditional AR pistol with a folding brace, but neither offered the same combination of compact size and proven reliability that the CMMG Dissent promised. The Dissent’s innovative design, with its self-contained action, set it apart. My first impression was one of cautious optimism – the CMMG Dissent looked and felt impressive, but the true test would be its performance on the range.
Real-World Testing: Putting CMMG Dissent MK4 Complete Upper Receiver 5.56x45mm 10.5″ Threaded Barrel Sniper Gray Cerakote to the Test
First Use Experience
My initial testing took place at my local outdoor range, a familiar environment where I could focus on evaluating the CMMG Dissent without distractions. I paired the upper with a standard AR-15 lower receiver and immediately noticed the reduced overall length compared to my other AR pistols. The non-reciprocating side charger was intuitive to use, allowing for quick and easy bolt manipulation.
The Dissent performed admirably in dry, sunny conditions. The felt recoil was noticeable, but manageable, especially with the included CMMG Zeroed Blast Compensator. I did experience a few failures to extract during the first magazine, but this cleared up after a quick cleaning and lubrication.
Ease of use was a major plus; transitioning from a standard AR to the Dissent was seamless, thanks to the familiar controls. The side charger felt natural and allowed me to maintain a solid cheek weld while cycling the action. The initial hiccups with extraction were a minor concern, but the subsequent reliability was encouraging.
Extended Use & Reliability
After several range sessions and a few hundred rounds fired, the CMMG Dissent has proven to be a reliable performer. The initial extraction issues disappeared after the first hundred rounds, and I haven’t experienced any malfunctions since. The Sniper Gray Cerakote finish has held up well, showing no signs of wear despite being bumped around in my range bag.
Maintenance is straightforward, requiring the same basic cleaning and lubrication as any other AR-15. The self-contained action simplifies disassembly and reassembly, making it easy to keep the upper in top condition. Compared to my previous experiences with short-barreled AR-15s, the Dissent offers a smoother and more reliable shooting experience, especially without the complication of a buffer tube.
Breaking Down the Features of CMMG Dissent MK4 Complete Upper Receiver 5.56x45mm 10.5″ Threaded Barrel Sniper Gray Cerakote
Specifications
The CMMG Dissent MK4 Complete Upper Receiver 5.56x45mm 10.5″ Threaded Barrel Sniper Gray Cerakote boasts some impressive specifications. It is chambered in 5.56x45mm NATO, making it compatible with readily available ammunition. The 10.5″ barrel provides a good balance between compactness and ballistic performance.
The receiver is constructed from durable 7075-T6 Aluminum, ensuring strength and longevity. The barrel features a 1:7″ twist rate, optimized for stabilizing a wide range of bullet weights. The 9.60″ M-LOK handguard allows for easy attachment of accessories.
It comes with a CMMG Zeroed Blast Compensator to help mitigate recoil and muzzle flash. The upper is finished in a durable Sniper Gray Cerakote for enhanced corrosion resistance and a sleek appearance. It features a 1/2″x28 thread pattern allowing a wide variety of muzzle devices to be used.
These specifications translate into a compact, reliable, and accurate upper receiver that is well-suited for a variety of applications. The M-LOK handguard provides ample space for accessories, while the Cerakote finish ensures long-term durability. The 1:7″ twist rate offers versatility with different ammunition types.
Performance & Functionality
The CMMG Dissent MK4 Complete Upper Receiver performs exceptionally well. Accuracy is excellent, consistently producing tight groupings at 50 yards with a red dot sight. The radial delayed blowback system helps to reduce felt recoil, making it easier to stay on target during rapid fire.
The non-reciprocating side charger is a standout feature, allowing for quick and easy bolt manipulation without disrupting your sight picture. The primary weakness is the price, but the performance and innovative design justify the investment. It definitely meets and exceeds expectations for a compact AR upper.
Design & Ergonomics
The build quality is outstanding, with tight tolerances and a flawless Sniper Gray Cerakote finish. The upper feels solid and well-balanced, even with accessories attached to the M-LOK handguard. The Dissent is surprisingly comfortable to shoot, despite its compact size.
There is a slight learning curve associated with the non-reciprocating side charger, but it quickly becomes second nature. Overall, the CMMG Dissent exhibits excellent design and ergonomics.
Durability & Maintenance
The 7075-T6 Aluminum receiver and Cerakote finish ensure long-term durability. With proper care and maintenance, the CMMG Dissent should last for many years. Cleaning and lubricating the upper is straightforward, requiring only basic tools and solvents.
Accessories and Customization Options
The CMMG Dissent is highly customizable, thanks to its M-LOK handguard and standard AR-15 lower receiver compatibility. You can easily add sights, lights, lasers, and other accessories to the handguard. The 1/2″x28 threaded barrel also allows for the installation of different muzzle devices, such as suppressors or flash hiders.
It is compatible with most standard AR-15 lower receivers and magazines. This versatility makes it easy to tailor the Dissent to your specific needs and preferences. The provided 1913 Picatinny rail end plate enables easy integration with stocks or braces designed for that standard.
Pros and Cons of CMMG Dissent MK4 Complete Upper Receiver 5.56x45mm 10.5″ Threaded Barrel Sniper Gray Cerakote
Pros
- Ultra-Compact Design: Eliminates the need for a buffer tube, resulting in a significantly shorter overall length. This makes it ideal for vehicle carry, discreet storage, or maneuvering in tight spaces.
- Reliable Radial Delayed Blowback System: Ensures smooth and reliable operation, reducing felt recoil and improving accuracy. This system is proven and provides a consistent shooting experience.
- Non-Reciprocating Side Charger: Allows for quick and easy bolt manipulation without disrupting your sight picture. It provides more control and allows maintaining a proper shooting grip.
- Durable Construction: Features a 7075-T6 Aluminum receiver and Sniper Gray Cerakote finish for long-lasting performance. This ensures the upper can withstand harsh conditions.
- High Level of Customization: Compatible with standard AR-15 lower receivers, magazines, and accessories. The M-LOK handguard and threaded barrel offer numerous customization options.
Cons
- High Price Point: The CMMG Dissent is significantly more expensive than a standard AR-15 upper receiver. This can be a barrier for some buyers, but the innovative design comes with a premium.
- Proprietary Internals: Repairs may require sending the upper back to CMMG for specialized service. The unique action design may not be easily serviceable by all gunsmiths.
Who Should Buy CMMG Dissent MK4 Complete Upper Receiver 5.56x45mm 10.5″ Threaded Barrel Sniper Gray Cerakote?
The CMMG Dissent MK4 Complete Upper Receiver 5.56x45mm 10.5″ Threaded Barrel Sniper Gray Cerakote is perfect for shooters who prioritize compactness, maneuverability, and reliability in a 5.56 platform. This is ideal for law enforcement professionals, security personnel, or anyone who needs a discreet and easily transportable firearm. It is also a good choice for those seeking a unique and innovative AR-15 experience.
Those who should skip this product are budget-conscious shooters or those who prefer a traditional AR-15 configuration. Also, those who prioritize easy field maintenance might find the proprietary internals a drawback.
Must-have accessories or modifications include a quality red dot sight or optic, a weapon light, and a sling. A brace or stock designed for use with a 1913 Picatinny rail end plate is also essential for completing the build.
Conclusion on CMMG Dissent MK4 Complete Upper Receiver 5.56x45mm 10.5″ Threaded Barrel Sniper Gray Cerakote
The CMMG Dissent MK4 Complete Upper Receiver 5.56x45mm 10.5″ Threaded Barrel Sniper Gray Cerakote is a game-changer in the world of AR-15s. It offers a unique combination of compactness, reliability, and performance that is unmatched by traditional designs. While the price point may be a barrier for some, the innovative design and superior build quality justify the investment for those who need a truly compact and capable 5.56 platform.
The value proposition is clear: you’re paying for a cutting-edge design that solves a specific problem – the need for a buffer tube-less AR-15. I would highly recommend the CMMG Dissent to anyone looking for a compact, reliable, and highly customizable AR-15 upper receiver. Embrace the Dissent and experience the future of AR pistol design.