CMMG Dissent MK4 5.7x28mm 6.50″, Left Side Charging Handle, Armor Black, OEM Zeroed Linear Comp, 4.60″ M-LOK Handguard Review

First Thoughts on the CMMG Dissent MK4 5.7x28mm 6.50″, Left Side Charging Handle, Armor Black, OEM Zeroed Linear Comp, 4.60″ M-LOK Handguard

The CMMG Dissent MK4 5.7x28mm 6.50″, Left Side Charging Handle, Armor Black, OEM Zeroed Linear Comp, 4.60″ M-LOK Handguard represents a bold step forward in compact firearm design, especially given the ever-shifting landscape of pistol brace regulations. CMMG aims to offer a solution for those seeking AR pistol performance without the legal uncertainties. This firearm piqued my interest as a potential solution for close-quarters defense and a compact, easily transportable platform chambered in the high-velocity 5.7x28mm cartridge.

My personal quest for the ultimate PDW (Personal Defense Weapon) has taken me down many rabbit holes. I was seeking something easily concealed, capable of accurate fire at moderate ranges, and chambered in a cartridge with proven stopping power – the 5.7x28mm seemed like a great fit, and the Dissent’s innovative design promised to deliver.

Unboxing the CMMG Dissent MK4, the first thing that struck me was the build quality. The Armor Black finish is immaculate, and the overall feel is solid and robust, projecting an image of reliability. The left-side charging handle is intuitively placed and the 4.60″ M-LOK handguard provides ample space for accessories despite its diminutive size.

Compared to other braced AR pistols I’ve handled, the Dissent immediately felt different. The absence of a traditional buffer tube makes it noticeably shorter and more maneuverable. I’ve considered options like the Sig Sauer MPX and even building my own AR-57 pistol, but the Dissent’s compact action promised to address the length and weight issues I encountered with those platforms.

My initial impression was one of excitement tempered with a touch of skepticism. Could CMMG really deliver on the promise of a reliable, accurate, and controllable firearm in such a small package? The unique design certainly warrants further investigation.

Real-World Testing: Putting CMMG Dissent MK4 5.7x28mm 6.50″, Left Side Charging Handle, Armor Black, OEM Zeroed Linear Comp, 4.60″ M-LOK Handguard to the Test

First Use Experience

My first trip to the range with the CMMG Dissent MK4 was at an outdoor facility, offering a variety of shooting distances and scenarios. I tested the Dissent under sunny conditions, firing from various positions, including standing, kneeling, and prone.

The Dissent performed surprisingly well. Recoil was manageable, thanks in part to the OEM Zeroed Linear Comp. I did find the short sight radius took some getting used to, but after a few magazines, I was consistently hitting targets out to 50 yards.

The initial experience wasn’t without its minor quirks. The charging handle, while intuitively placed, required a bit more force than I anticipated. I also noted some initial stiffness in the magazine release, but that seemed to break in with use.

Extended Use & Reliability

After several hundred rounds fired over a few months, the CMMG Dissent MK4 has proven to be remarkably reliable. I’ve experienced no malfunctions related to the action or cycling of the ammunition.

The Armor Black finish has held up well to regular use and handling, with minimal signs of wear. Cleaning and maintenance are straightforward, thanks to the easily accessible action and simple design. A quick wipe-down and lubrication after each range session have kept the Dissent running smoothly.

Compared to some AR pistols I’ve owned that require constant tinkering, the Dissent has been a breath of fresh air. It consistently performs as expected, making it a trustworthy and enjoyable firearm to shoot.

Breaking Down the Features of CMMG Dissent MK4 5.7x28mm 6.50″, Left Side Charging Handle, Armor Black, OEM Zeroed Linear Comp, 4.60″ M-LOK Handguard

Specifications

The CMMG Dissent MK4 5.7x28mm 6.50″, Left Side Charging Handle, Armor Black, OEM Zeroed Linear Comp, 4.60″ M-LOK Handguard boasts some impressive specs for its size. It is chambered in 5.7x28mm, a high-velocity cartridge known for its flat trajectory and effective terminal ballistics.

• Caliber: 5.7x28mm This cartridge offers a significant advantage in terms of velocity and range compared to traditional pistol calibers.
• Barrel Length: 6.50″ The short barrel contributes to the overall compact size of the Dissent, making it ideal for maneuvering in tight spaces.
• Twist: 1:9″ The 1:9″ twist rate is optimized for stabilizing the 5.7x28mm projectile, ensuring accuracy at various distances.
• Barrel Finish: Black Provides corrosion resistance and a sleek aesthetic.
• Receiver Finish: Armor Black The Armor Black finish is exceptionally durable and provides excellent protection against the elements.
• Handguard: 4.60″ M-LOK Offers ample space for mounting accessories like lights, lasers, and foregrips.
• Charging Handle: Left Side, Non-Reciprocating Allows for quick and easy bolt operation without disrupting the shooter’s sight picture.
• Compensator: OEM Zeroed Linear Comp Helps to mitigate recoil and muzzle rise, improving controllability.

These specifications combine to create a compact, lightweight, and highly capable firearm. The innovative design of the CMMG Dissent eliminates the need for a traditional buffer tube, resulting in a significantly shorter overall length compared to typical AR-pattern pistols.

Performance & Functionality

The CMMG Dissent MK4 excels in both performance and functionality. Its accuracy is surprisingly good for such a short-barreled firearm, easily capable of hitting targets at distances of 50-75 yards with practice.

The radial delayed blowback action is smooth and reliable. Recoil is noticeably less than direct impingement AR pistols in similar calibers, making it easier to maintain control during rapid fire. The left-side charging handle is a huge plus for right-handed shooters, allowing for faster and more efficient reloads and malfunction clearances.

The biggest strength is definitely the innovative design, delivering AR performance in a significantly smaller package. One area for improvement might be a slightly more refined trigger, as it is a bit heavy from the factory, though this is easily addressed with aftermarket options. Overall, the CMMG Dissent MK4 meets and even exceeds expectations for a PDW-style firearm.

Design & Ergonomics

The CMMG Dissent MK4 features a well-thought-out design that prioritizes ergonomics and functionality. The Armor Black finish is not only visually appealing but also provides excellent resistance to scratches and wear. The weight is well-balanced, making it comfortable to hold and shoot for extended periods.

The M-LOK handguard is slim and comfortable, providing a secure grip. The left-side charging handle is easily accessible and intuitive to use. There’s a slight learning curve associated with manipulating the controls efficiently, but overall, the design is very user-friendly.

Durability & Maintenance

Based on my experience, the CMMG Dissent MK4 is built to last. The high-quality materials and robust construction inspire confidence in its long-term durability.

Maintenance is simple and straightforward, requiring only basic cleaning and lubrication after each use. The action is easily accessible for cleaning, and the parts are well-made and resistant to wear.

Accessories and Customization Options

The CMMG Dissent MK4 offers a wide range of customization options. The M-LOK handguard allows for easy attachment of lights, lasers, foregrips, and other accessories.

The 1913 Picatinny rail end plate allows the use of various stocks or braces, depending on the user’s preference and legal requirements. While CMMG offers its own line of accessories, the Dissent is also compatible with many popular AR-15 accessories, allowing for extensive customization to suit individual needs. Consider adding a red dot optic for faster target acquisition and improved accuracy.

Pros and Cons of CMMG Dissent MK4 5.7x28mm 6.50″, Left Side Charging Handle, Armor Black, OEM Zeroed Linear Comp, 4.60″ M-LOK Handguard