What Makes CMMG Dissent .45 ACP 6.5in Upper Group Stand Out?
The CMMG Dissent .45 ACP 6.5in Upper Group is a unique offering in the AR pistol market. Manufactured by CMMG, it’s designed to offer a compact, bufferless .45 ACP platform, addressing concerns about pistol brace regulations. Its innovative action and side-charging handle set it apart, promising a blend of power and maneuverability in a familiar AR package.
I was looking for a .45 ACP platform that didn’t require a traditional buffer tube, something truly compact for vehicle carry and discreet deployment. Traditional AR-45 builds can be bulky, and I wanted something more streamlined without sacrificing the stopping power of the .45 ACP round.
Upon unboxing, the first thing that struck me was the build quality. The upper felt solid, and the side-charging handle was smooth and intuitive. The CMMG Dissent felt purpose-built, not just another slapped-together AR variant.
I considered the Angstadt Arms UDP-45 and the Kriss Vector SDP. The UDP-45 is a solid platform, but still relies on a buffer tube. The Kriss Vector, while compact, has a distinct look that I wasn’t always fond of. The CMMG Dissent offered a more traditional AR aesthetic with the bufferless design I craved.
My first impression was one of cautious excitement. I was eager to see if its innovative design translated to reliable performance at the range. I was excited about the prospect of having a compact, powerful .45 ACP AR pistol.
Real-World Testing: Putting CMMG Dissent .45 ACP 6.5in Upper Group to the Test
First Use Experience
I took the CMMG Dissent .45 ACP 6.5in Upper Group to my local outdoor range, mounted on a dedicated AR-15 lower receiver. I wanted to test its reliability with various .45 ACP ammunition types. The range provided a controlled environment, but I also simulated some tactical scenarios.
The CMMG Dissent performed well in dry conditions, however the side charger felt a little stiff during the first few magazines. There were no malfunctions, and the recoil was surprisingly manageable for such a short barrel .45 ACP.
It took a few magazines to get used to the side-charging handle. Unlike a traditional AR, you rack it from the side, not the rear. This was a learning curve but ultimately proved to be a faster and more ergonomic charging method.
Initially, the bolt didn’t lock back on the last round with some lighter target loads. After a quick adjustment to the bolt catch, the issue was resolved.
Extended Use & Reliability
After several range trips and hundreds of rounds, the CMMG Dissent .45 ACP 6.5in Upper Group has proven to be impressively reliable. It cycles consistently with various ammunition types, from standard FMJ to defensive hollow points. The finish is holding up well, with no noticeable wear marks despite being bumped around in my range bag.
There are no signs of significant wear and tear. The CMMG‘s Cerakote finish has resisted scratches and abrasions. The charging handle remains smooth and functional.
Cleaning is straightforward; it’s essentially a standard AR-15 with a modified bolt carrier group. A quick scrub and lubrication after each range session is all it takes to keep it running smoothly.
Compared to previous .45 ACP AR builds, the CMMG Dissent is a significant upgrade. It is more compact, reliable, and easier to maintain than my previous attempts at building a .45 ACP AR pistol.
Breaking Down the Features of CMMG Dissent .45 ACP 6.5in Upper Group
Specifications
- Caliber: .45 ACP. This offers substantial stopping power in a compact platform.
- Barrel Length: 6.5 inches. This length strikes a balance between maneuverability and ballistic performance.
- Barrel Profile: Medium Taper. This profile helps manage weight while maintaining accuracy.
- Barrel Twist Rate: 1-16. Optimized for stabilizing .45 ACP projectiles.
- Threads per Inch: .578×28. This allows for the attachment of .45 ACP-compatible muzzle devices and suppressors.
- Muzzle Device: CMMG Zeroed Muzzle Brake. This helps reduce felt recoil and muzzle rise.
- Fabric/Material: Aluminum. The aluminum construction keeps the upper lightweight.
- Gas Block Journal Size-Diameter: .750 in. While it doesn’t use a gas block in the traditional sense, this dimension is relevant to the barrel’s profile.
- Handguard Length: 5 inches. The short handguard contributes to the overall compact size.
- Gun Rail: M-LOK. This allows for easy attachment of accessories such as lights, lasers, and grips.
- Weight: 3.8 lb, 3 lb. The listed weight is light enough for comfortable handling.
- Barrel Material: 4140 Chrome Moly Vanadium. This provides excellent strength and durability.
- Magazine Included: No. Magazines must be purchased separately.
These specifications matter because they contribute to the CMMG Dissent‘s compact size, manageable recoil, and overall reliability. The bufferless design, combined with the .45 ACP chambering, offers a unique shooting experience.
Performance & Functionality
The CMMG Dissent .45 ACP 6.5in Upper Group performs admirably, delivering accurate and reliable .45 ACP firepower in a small package. The radial delayed blowback system effectively manages recoil. The side-charging handle allows for quick and efficient manipulation of the bolt.
The CMMG Dissent excels in close-quarters scenarios, offering excellent maneuverability and substantial stopping power. The side-charging handle is a significant advantage for maintaining a sight picture during reloading. The only area for improvement might be the initial stiffness of the charging handle, which smoothed out over time.
Overall, the CMMG Dissent meets and exceeds expectations. It delivers on its promise of a compact, reliable, and powerful .45 ACP platform.
Design & Ergonomics
The CMMG Dissent .45 ACP 6.5in Upper Group boasts a well-thought-out design, utilizing high-quality materials for a durable and comfortable platform. The aluminum construction keeps the weight down, while the Cerakote finish provides excellent corrosion resistance. The ergonomics are generally good, with the side-charging handle being a standout feature.
The build quality is excellent. The upper feels solid and well-made. There is a slight learning curve with the side-charging handle, but it quickly becomes intuitive.
Durability & Maintenance
The CMMG Dissent .45 ACP 6.5in Upper Group is built to last. The 4140 Chrome Moly Vanadium barrel and aluminum receiver are durable and resistant to wear and tear. Maintenance is straightforward, requiring only basic cleaning and lubrication.
With proper care, this upper should provide years of reliable service. Cleaning is simple, utilizing standard AR-15 cleaning tools and solvents.
Accessories and Customization Options
The CMMG Dissent .45 ACP 6.5in Upper Group includes a CMMG Zeroed Muzzle Brake and a 1913 Picatinny rail end plate. This allows for the attachment of various braces or stocks. The M-LOK handguard provides ample space for mounting accessories such as lights, lasers, and grips.
The CMMG Dissent is compatible with most AR-15 lowers, allowing for a wide range of customization options. Aftermarket triggers, pistol grips, and sights can be easily installed.
Pros and Cons of CMMG Dissent .45 ACP 6.5in Upper Group
Pros
- Compact and lightweight design.
- Bufferless operation.
- Reliable radial delayed blowback system.
- Side-charging handle for improved ergonomics.
- Durable construction and finish.
Cons
- Magazines not included.
- Premium price point.
Who Should Buy CMMG Dissent .45 ACP 6.5in Upper Group?
Perfect for: Individuals seeking a compact and powerful .45 ACP platform for personal defense, vehicle carry, or discreet deployment. It’s also ideal for AR enthusiasts looking for a unique and innovative build.
Who should skip this product? Those on a tight budget or who prefer traditional AR buffer systems might want to explore other options.
Must-have accessories or modifications? A quality brace or stock, a red dot sight, and reliable .45 ACP magazines are essential for maximizing the CMMG Dissent‘s potential.
Conclusion on CMMG Dissent .45 ACP 6.5in Upper Group
The CMMG Dissent .45 ACP 6.5in Upper Group is a well-engineered and innovative product that delivers on its promise of a compact, reliable, and powerful .45 ACP platform. Its bufferless design, side-charging handle, and durable construction make it a standout option in the AR pistol market. While it comes with a premium price tag, the performance and unique features justify the investment for those seeking a top-tier .45 ACP AR pistol.
The price is justified by the innovative design, high-quality components, and reliable performance.
I would highly recommend the CMMG Dissent .45 ACP 6.5in Upper Group to anyone looking for a compact and powerful .45 ACP AR pistol. If you’re looking for a unique and reliable platform, the CMMG Dissent is definitely worth considering. Upgrade your AR pistol game – you won’t be disappointed!