What Makes the CMMG Dissent Mk4 5.56mm 16.1in Empire Profile Upper Group Stand Out?
The CMMG Dissent Mk4 5.56mm 16.1in Empire Profile Upper Group isn’t just another AR-15 upper; it’s a meticulously engineered piece from CMMG designed for shooters who demand a blend of performance, reliability, and state-compliant features. This complete upper assembly boasts a 16.1″ Empire Profile barrel, an unthreaded muzzle, and a recessed target crown, making it an attractive option for those in restrictive states or those prioritizing muzzle device flexibility. Its ready-to-install design and focus on a balanced shooting experience make it stand out from the crowded AR-15 upper market.
Years of tactical and outdoor experience have taught me the value of adaptability. I needed a reliable, accurate 5.56mm upper receiver that could be easily swapped onto existing AR-15 lowers while maintaining compliance with local regulations, all without sacrificing performance.
My first impression upon unboxing was the noticeable quality of the CMMG. The fit and finish were excellent, with no visible blemishes or imperfections, and the weight felt balanced and manageable.
Compared to similar uppers from Bravo Company Manufacturing (BCM) and Daniel Defense, the CMMG Dissent stood out due to its specific attention to state compliance and unique Empire Profile barrel. While BCM and Daniel Defense are renowned for their ruggedness, the CMMG’s combination of features felt more tailored to my specific needs.
My initial reaction was excitement; the CMMG Dissent appeared to be precisely what I was looking for – a high-quality, compliant, and versatile upper receiver.
Real-World Testing: Putting the CMMG Dissent Mk4 5.56mm 16.1in Empire Profile Upper Group to the Test
First Use Experience
I initially tested the CMMG Dissent Mk4 at my local outdoor shooting range. The weather was mild, with a slight breeze, perfect conditions for sighting in the new upper receiver.
The CMMG Dissent performed flawlessly, experiencing no malfunctions or failures to feed. The recoil felt manageable, and the accuracy was immediately apparent, producing tight groupings at 50 and 100 yards. I quickly became accustomed to its handling and smooth operation.
Extended Use & Reliability
After several months of consistent use, the CMMG Dissent Mk4 continues to impress. The finish remains durable, showing minimal signs of wear despite frequent use and cleaning.
Regular cleaning is simple, and the components are easily accessible. Compared to other AR-15 uppers I’ve used, the CMMG Dissent stands out for its consistent performance and reliability. The CMMG surpasses my expectations for a compliant upper, delivering accuracy and dependability in every range session.
Breaking Down the Features of the CMMG Dissent Mk4 5.56mm 16.1in Empire Profile Upper Group
Specifications
Caliber: 5.56mm. This ensures broad compatibility with common AR-15 magazines and ammunition.
Barrel Length: 16.1 inches. This meets the legal minimum for rifle barrels in most states, providing a good balance of maneuverability and ballistic performance.
Barrel Profile: Bull. The “Empire Profile” is a medium-taper barrel design that optimizes weight and stiffness, aiding in accuracy.
Barrel Twist Rate: 1-7. This twist rate stabilizes a wide range of bullet weights, making it suitable for both lighter and heavier 5.56mm ammunition.
Threads per Inch: Non-Threaded. Designed for state compliance in areas where threaded barrels are restricted.
Fabric/Material: Aluminum. Keeps the overall weight down without sacrificing durability.
Handguard Length: 15 inches. Offers ample space for mounting accessories and provides a comfortable grip.
Gun Rail: M-LOK. Allows for easy attachment of M-LOK compatible accessories.
Weight: 3.9 lb – 4 lb. This is a reasonable weight for a complete upper receiver group, contributing to a well-balanced rifle.
Barrel Material: 4140 Chrome Moly Vanadium. Known for its strength and heat resistance, ensuring long barrel life.
Magazine Included: No. This is standard for upper receiver groups, allowing the user to utilize their existing AR-15 magazines.
These specifications combine to create an upper receiver that is accurate, reliable, and compliant, making it a versatile option for a wide range of shooters.
Performance & Functionality
The CMMG Dissent Mk4 excels in performance and functionality. Its accuracy is commendable, consistently producing tight groupings at various distances.
The upper is highly reliable, with no malfunctions experienced during testing, and its usability is enhanced by the M-LOK handguard, which allows for easy accessory mounting. The CMMG Dissent Mk4 consistently meets and exceeds expectations for a compliant AR-15 upper receiver.
Design & Ergonomics
The build quality of the CMMG Dissent Mk4 is exceptional. High-quality aluminum is used throughout, contributing to a balanced weight and robust feel.
The ergonomic design of the handguard ensures a comfortable and secure grip. There is a slight learning curve associated with any new AR-15 component, the CMMG Dissent Mk4 is exceptionally user-friendly.
Durability & Maintenance
With its high-quality materials and robust construction, the CMMG Dissent Mk4 is built to last. Regular cleaning and lubrication are all that is required to keep the upper receiver in top condition.
Parts are standard AR-15 compatible, making repair straightforward if needed.
Accessories and Customization Options
The CMMG Dissent Mk4 does not include any accessories beyond the complete upper receiver assembly. However, its M-LOK handguard provides a wide range of customization options for optics, lights, lasers, and foregrips.
The upper receiver is compatible with most standard AR-15 lower receivers and magazines.
Pros and Cons of the CMMG Dissent Mk4 5.56mm 16.1in Empire Profile Upper Group
Pros
- Excellent Accuracy: Consistently produces tight groupings.
- High Reliability: Experienced zero malfunctions during testing.
- State Compliant: Designed for use in restrictive states.
- M-LOK Handguard: Provides ample space for accessories.
- High-Quality Materials: Ensures durability and longevity.
Cons
- Non-Threaded Muzzle: Limits muzzle device options.
- Price: Relatively expensive compared to standard uppers.
Who Should Buy the CMMG Dissent Mk4 5.56mm 16.1in Empire Profile Upper Group?
The CMMG Dissent Mk4 5.56mm 16.1in Empire Profile Upper Group is perfect for shooters in states with restrictive firearms laws seeking a high-performance, compliant AR-15 upper receiver. It’s also ideal for those who prioritize accuracy and reliability in a 5.56 platform.
Those who require a threaded barrel for specific muzzle devices or are on a very tight budget might want to skip this product. A quality optic and weapon light are must-have accessories to maximize the potential of this upper.
Conclusion on the CMMG Dissent Mk4 5.56mm 16.1in Empire Profile Upper Group
The CMMG Dissent Mk4 5.56mm 16.1in Empire Profile Upper Group is a top-tier AR-15 upper receiver that delivers exceptional performance and reliability. The price is justified by the quality of materials, precision engineering, and state-compliant features.
I would highly recommend this upper to anyone seeking a reliable, accurate, and compliant 5.56 platform. Upgrade your AR-15 today with the CMMG Dissent Mk4 and experience the difference!