CMMG Inc. Dissent Mk4 – 22Arc – Coyote – Upper Review

The CMMG Inc. Dissent Mk4 – 22Arc – Coyote – Upper Made a Bold First Impression

The CMMG Inc. Dissent Mk4 – 22Arc – Coyote – Upper is not your average AR-15 upper receiver. It’s a specialized piece designed for compact builds and chambered in the .22 ARC cartridge. Its side-charging handle and lack of a traditional buffer tube immediately set it apart, promising a unique shooting experience.

My search for the CMMG Inc. Dissent Mk4 – 22Arc – Coyote – Upper started with a desire for a highly maneuverable, lightweight platform chambered in something other than 5.56 NATO. I wanted something compact enough to fit in a backpack, yet capable of accurate, controlled fire for varmint hunting and recreational target shooting. The .22 ARC’s ballistics and the Dissent’s innovative design seemed to be the perfect match.

Unboxing the CMMG Inc. Dissent Mk4 – 22Arc – Coyote – Upper was impressive. The CMMG Coyote Cerakote finish looked fantastic, and the overall build quality felt robust. The absence of a buffer tube gave it an immediate advantage in terms of compactness.

Compared to a standard AR-15 upper or even other short-barreled rifle (SBR) uppers, the CMMG Dissent Mk4 truly stood out. The Sig Sauer MCX and the Q Honey Badger were considerations, but the Dissent’s price point and unique operating system made it a more compelling option for my specific needs. I picked this particular upper because of its blend of modern design, compact footprint, and interesting .22 ARC chambering.

My first impression was excitement tempered with a bit of skepticism. The design was undeniably cool and innovative, but I wondered how it would perform under real-world conditions. I was eager to get it to the range and see if it lived up to the hype.

Real-World Testing: Putting CMMG Inc. Dissent Mk4 – 22Arc – Coyote – Upper to the Test

First Use Experience

I first tested the CMMG Inc. Dissent Mk4 – 22Arc – Coyote – Upper at my local outdoor shooting range. The weather was mild and sunny, providing ideal conditions for initial testing. I mounted it on a dedicated lower receiver and used a variety of .22 ARC ammunition.

The Dissent performed admirably in the good weather. Recoil was minimal, and the side-charging handle was surprisingly comfortable to use, allowing for quick follow-up shots. I got used to the controls fairly quickly, although the side-charging handle location took some minor adjustment compared to a traditional AR platform.

There were no immediate issues or surprises after the first use. The upper functioned flawlessly, cycling rounds consistently and accurately. I noticed that it ran cleaner than expected.

Extended Use & Reliability

After several weeks of consistent use, the CMMG Inc. Dissent Mk4 – 22Arc – Coyote – Upper has held up remarkably well. I’ve put hundreds of rounds through it, and it continues to function reliably.

The Coyote Cerakote finish has proven to be quite durable, showing only minor signs of wear in high-friction areas. The internal components seem to be well-made and show no signs of excessive wear. Cleaning is straightforward, similar to other AR-pattern firearms, although the gas piston system does require occasional cleaning for optimal performance.

Compared to my experiences with standard AR-15 uppers, the Dissent offers a noticeably more compact and maneuverable platform. It outperforms other similar platforms in terms of size and weight. Its reliability is very good.

Breaking Down the Features of CMMG Inc. Dissent Mk4 – 22Arc – Coyote – Upper

Specifications

• Caliber: .22 ARC (Advanced Rifle Cartridge). This caliber is designed for accuracy and extended range in a small-bore platform.

• Barrel Length: 16.1 inches. This barrel length strikes a balance between compact size and optimal ballistics for the .22 ARC cartridge.

• Finish: Coyote Cerakote. This provides a durable and aesthetically pleasing protective coating.

• Operating System: Gas Piston, Short Stroke. The gas piston system enhances reliability and reduces felt recoil.

• Charging Handle: Non-Reciprocating Side Charging Handle. This allows for easier and faster charging, especially when using optics.

• Receiver Material: Aluminum. This keeps the upper receiver lightweight.

These specifications combine to create a unique and effective firearm. The side-charging handle greatly improves ergonomics, while the gas piston system increases reliability and reduces recoil. The .22 ARC caliber paired with the 16.1-inch barrel delivers accuracy and range.

Performance & Functionality

The CMMG Inc. Dissent Mk4 – 22Arc – Coyote – Upper performs exceptionally well. Accuracy is excellent, especially with match-grade ammunition. It is also highly reliable.

Its strengths lie in its compact size, smooth recoil impulse, and side-charging handle. The main weakness is the limited availability of .22 ARC ammunition compared to more common calibers. It meets and even exceeds expectations, especially in terms of accuracy and maneuverability.

Design & Ergonomics

The build quality is excellent, with high-quality materials and precise machining. The CMMG Inc. Dissent Mk4 – 22Arc – Coyote – Upper is surprisingly lightweight, making it easy to handle and carry.

The ergonomics are well thought out, with the side-charging handle being a standout feature. There’s a slight learning curve for those accustomed to a traditional AR-15, but the benefits are worth it.

Durability & Maintenance

The CMMG Inc. Dissent Mk4 – 22Arc – Coyote – Upper feels very durable and well-made. With proper care, it should last for many years.

Maintenance is relatively easy. The gas piston system requires periodic cleaning, but overall, the upper is simple to disassemble and maintain.

Accessories and Customization Options

The CMMG Inc. Dissent Mk4 – 22Arc – Coyote – Upper is compatible with most standard AR-15 lowers. This allows for a high degree of customization.

It can be customized with various optics, grips, and muzzle devices. Given the .22 ARC chambering, selecting a dedicated .22 caliber suppressor can further enhance the shooting experience.

Pros and Cons of CMMG Inc. Dissent Mk4 – 22Arc – Coyote – Upper