What Makes CMMG Dissent Mk47 7.62X39 16.1in Upper Group Stand Out?
The CMMG Dissent Mk47 7.62X39 16.1in Upper Group is a unique offering in the AR-15 world. This upper receiver assembly ditches the traditional buffer tube, allowing for compact builds and innovative configurations while chambering the venerable 7.62x39mm cartridge and feeding from AK-47 magazines. CMMG has a reputation for pushing boundaries, and the Dissent line is a testament to that, promising a blend of AR ergonomics and AK power in a streamlined package.
I was looking for a compact and reliable upper receiver for my AR-15 platform that could deliver the punch of the 7.62x39mm round. The standard AR-15/AK-47 magazine conversions always felt like a compromise, and I wanted something more purpose-built. The Dissent’s bufferless design and compatibility with AK magazines immediately caught my eye.
Upon unboxing, the CMMG Dissent Mk47 felt solid and well-made. The Cerakote finish was evenly applied, and the M-LOK handguard felt sturdy. The absence of a buffer tube gave it an unusual but appealing profile, and the forward charging handle was a welcome change from the traditional AR setup.
Compared to other 7.62x39mm AR uppers I’ve considered, like those from PSA and Anderson Manufacturing, the CMMG stands out due to its bufferless system and reputation for higher quality control. I chose the Dissent because I wanted to prioritize compactness and reliability over budget-friendliness.
My first impression was excitement mixed with a bit of skepticism. The concept was intriguing, but I was eager to see if it lived up to the hype in terms of performance and reliability.
Real-World Testing: Putting CMMG Dissent Mk47 7.62X39 16.1in Upper Group to the Test
First Use Experience
I first tested the CMMG Dissent Mk47 at my local outdoor shooting range. I paired it with a dedicated Mk47 lower receiver and used a variety of AK-47 magazines from Magpul and Bulgarian surplus. The weather was clear and mild, perfect for a range day.
The upper performed surprisingly well, with consistent cycling and good accuracy. I experienced no malfunctions in the first 100 rounds using various types of 7.62x39mm ammunition, including steel-cased and brass-cased options. The forward charging handle was intuitive and easy to manipulate, allowing me to maintain my sight picture while reloading.
The only minor issue was the slightly heavier recoil compared to a standard 5.56 AR-15. It took a few rounds to get used to the difference, but it was manageable.
Extended Use & Reliability
After several months of regular use, the CMMG Dissent Mk47 has proven to be a reliable and capable upper receiver. I’ve put roughly 500 rounds through it and experienced only a handful of malfunctions, all of which were attributed to a particularly dirty surplus magazine. The bolt hold-open feature works consistently, and the rifle has maintained its zero even after being transported in a range bag.
The Cerakote finish has held up well, showing only minor wear marks on the ejection port. Cleaning the upper is relatively straightforward. The direct impingement gas system requires regular cleaning, especially when shooting steel-cased ammunition.
Compared to my previous experience with a budget-friendly 7.62×39 AR conversion, the CMMG Dissent is in a different league. It has proven far more reliable and accurate, making it well worth the investment.
Breaking Down the Features of CMMG Dissent Mk47 7.62X39 16.1in Upper Group
Specifications
- Caliber: 7.62x39mm. This cartridge provides significant stopping power and is widely available, though accuracy can vary depending on ammo quality.
- Overall Length: 25.5 inches. This compact length makes it suitable for close-quarters scenarios and storage.
- Barrel Length: 16.1 inches. This provides a good balance between maneuverability and ballistic performance, meeting the legal minimum for rifle barrels.
- Barrel Profile: Medium Taper. This helps reduce weight without sacrificing accuracy.
- Barrel Twist Rate: 1-10. This twist rate is optimized for stabilizing common 7.62x39mm bullet weights.
- Threads per Inch: 5/8×24. This is a standard thread pitch for 7.62 caliber rifles, allowing for easy attachment of muzzle devices and suppressors.
- Muzzle Device: CMMG Zeroed Muzzle Brake. This helps reduce recoil and muzzle climb, improving shot-to-shot recovery.
- Fabric/Material: Aluminum. This makes the upper receiver lightweight yet durable.
- Gas Block Journal Size-Diameter: .750 in. This is a common gas block size, providing compatibility with many aftermarket options.
- Handguard Length: 15 in. This provides ample rail space for mounting accessories.
- Gun Rail: M-LOK. This mounting system allows for modular attachment of accessories like lights, lasers, and grips.
- Weight: 5.6 lb, 5 lb. The weight can depend on the chosen handguard and end plate configuration.
- Barrel Material: 4140 Chrome Moly Vanadium. This is a durable steel alloy commonly used for rifle barrels.
- Magazine Included: No. You will need to source your own AK-47 magazines.
Performance & Functionality
The CMMG Dissent Mk47 excels in reliability and ease of use. Its direct impingement system is tuned for the 7.62x39mm cartridge, providing consistent cycling with various ammunition types.
The accuracy is acceptable for a 7.62x39mm platform. Expect around 2-3 MOA with quality ammunition. The bufferless design allows for compact storage and easy transport.
While it isn’t a precision rifle, it does meet expectations as a reliable and maneuverable firearm.
Design & Ergonomics
The build quality of the CMMG Dissent Mk47 is excellent. The materials are top-notch, and the fit and finish are superb. The weight is well-balanced, making it comfortable to handle and shoot.
The ergonomics are intuitive. The forward charging handle is a significant improvement over the traditional AR-15 charging handle. There is a small learning curve if you are accustomed to standard AR controls, but it is easy to master.
Durability & Maintenance
The CMMG Dissent Mk47 is built to last. The 4140 CMV barrel and aluminum receiver are designed to withstand heavy use. Proper maintenance, including regular cleaning and lubrication, is essential to ensure long-term reliability.
Maintenance is relatively straightforward. Standard AR-15 cleaning tools and solvents can be used.
Accessories and Customization Options
The CMMG Dissent Mk47 offers several customization options. The M-LOK handguard allows for the easy attachment of accessories like lights, lasers, and foregrips. The rear of the upper receiver accepts a picatinny rail end plate or buffer tube adapter, offering options for stocks and braces.
The upper is compatible with most standard AK-47 magazines, although some may require minor fitting. The 5/8×24 threaded barrel allows for the use of various muzzle devices and suppressors.
Pros and Cons of CMMG Dissent Mk47 7.62X39 16.1in Upper Group
Pros
- Bufferless design allows for compact builds and easy storage. This is a major advantage for those looking for a highly portable 7.62x39mm platform.
- Compatibility with AK-47 magazines ensures reliable feeding. AK magazines are widely available and known for their durability.
- Forward charging handle allows for quick and easy manipulation without disrupting sight picture. This feature enhances usability and speed, especially in dynamic shooting scenarios.
- High-quality materials and construction ensure durability and longevity. CMMG’s reputation for quality provides confidence in the product’s reliability.
- 7.62x39mm caliber provides significant stopping power. This makes it suitable for hunting, self-defense, and other applications where terminal ballistics are crucial.
Cons
- Price point is relatively high compared to other 7.62x39mm AR options. This may be a barrier to entry for some buyers.
- May require a dedicated Mk47 lower receiver for optimal performance. This adds to the overall cost.
Who Should Buy CMMG Dissent Mk47 7.62X39 16.1in Upper Group?
Perfect for: Those seeking a compact and powerful AR-platform chambered in 7.62x39mm with AK magazine compatibility. It is ideal for hunters needing a maneuverable rifle, or for individuals prioritizing a discreet and potent home-defense option.
Who should skip this product? Those on a tight budget may find more affordable 7.62x39mm AR options. Individuals who prefer the traditional AR-15 buffer tube system might not appreciate the Dissent’s bufferless design.
Must-have accessories or modifications? A quality Mk47 lower receiver designed for AK magazines is essential. A red dot sight or low-power variable optic (LPVO) would enhance accuracy and target acquisition.
Conclusion on CMMG Dissent Mk47 7.62X39 16.1in Upper Group
The CMMG Dissent Mk47 7.62X39 16.1in Upper Group is a well-engineered and innovative product that offers a unique blend of AR ergonomics and AK power. While the price point is higher than other options on the market, the bufferless design, AK magazine compatibility, and high-quality construction make it a worthwhile investment for those seeking a compact and reliable 7.62x39mm platform.
The value proposition is justified for those who prioritize compactness, reliability, and innovative design.
I would personally recommend it to anyone looking for a high-performance 7.62x39mm AR-15 upper receiver.
If you are looking for a reliable and compact 7.62x39mm upper, consider the CMMG Dissent Mk47. It might be the perfect fit for your needs.