First Impressions of CMMG Mk47 Banshee Upper Receiver Group
The CMMG Mk47 Banshee Upper Receiver Group represents an interesting hybrid in the AR platform world, chambered in the potent 7.62x39mm cartridge. This upper receiver combines the modularity of the AR-15 with the hard-hitting capabilities and readily available ammunition associated with the AK-47, creating a unique firearm. Its compact 8-inch barrel and CMMG‘s reputation for quality instantly piqued my interest.
I had been searching for a compact, hard-hitting upper to pair with a dedicated lower receiver, seeking a balance between maneuverability and stopping power for potential hog hunts and close-quarters training scenarios. The allure of using readily available and relatively inexpensive 7.62x39mm ammunition made the Mk47 Banshee a compelling option.
Upon unboxing, I was immediately struck by the solid feel and clean lines of the upper. The Armor Black finish was evenly applied and gave the impression of a rugged, durable product. The weight felt balanced, and the M-LOK handguard provided a comfortable and secure grip.
Compared to similar uppers chambered in 5.56 or even 300 Blackout, the Mk47 Banshee felt more substantial, likely due to the larger caliber and reinforced components required to handle the 7.62x39mm cartridge. I considered a similar upper from Palmetto State Armory, but the CMMG‘s reputation for higher quality and innovative design, particularly their Radial Delayed Blowback system (though not applicable on this direct impingement model), swayed my decision. My first impression was one of excitement; this seemed like a well-engineered and potentially very fun addition to my collection.
Real-World Testing: Putting CMMG Mk47 Banshee Upper Receiver Group to the Test
First Use Experience
I tested the CMMG Mk47 Banshee Upper Receiver Group at my local outdoor shooting range. I wanted to see how it performed with different types of 7.62x39mm ammunition, including steel-cased and brass-cased options. The weather was clear and sunny, with a slight breeze, ideal conditions for an initial range session.
The Mk47 Banshee proved surprisingly controllable for such a short-barreled 7.62x39mm firearm. I did experience a few failures to extract with some of the cheaper steel-cased ammo, but it ran flawlessly with brass-cased rounds. The recoil was manageable, though definitely more pronounced than a 5.56 AR-15.
Extended Use & Reliability
After several months of consistent use, the CMMG Mk47 Banshee Upper Receiver Group has proven to be a reliable and enjoyable platform, but not without minor caveats. The Armor Black finish has held up well with only minor scratches near the ejection port. Regular cleaning and lubrication are crucial, especially after using steel-cased ammunition, to prevent corrosion and ensure smooth operation.
Compared to my experiences with other AR-platform rifles, the Mk47 Banshee requires a bit more attention to detail when cleaning, due to the unique gas system and the residue left by some 7.62x39mm ammunition. However, the Mk47 Banshee has not disappointed me overall, delivering on its promise of compact size and potent firepower.
Breaking Down the Features of CMMG Mk47 Banshee Upper Receiver Group
Specifications
- Caliber: 7.62x39mm – This allows the use of readily available and often less expensive ammunition, a significant advantage.
- Overall Length: 16.5 inches – A compact package that balances maneuverability with reasonable ballistic performance.
- Barrel Length: 8 inches – This short barrel makes it extremely maneuverable, perfect for tight spaces or as a truck gun.
- Barrel Profile: Medium Taper – Strikes a good balance between weight and rigidity for consistent accuracy.
- Gas System Length: Pistol Length – Necessary for reliable cycling with the short barrel, but can result in increased felt recoil.
- Barrel Twist Rate: 1-10 – Optimized for stabilizing common 7.62x39mm bullet weights.
- Threads per Inch: 5/8×24 – A common thread pitch, allowing for a wide variety of muzzle devices.
- Muzzle Device: CMMG Zeroed Linear Compensator – Directs sound and concussion forward, improving the shooting experience for the user and those nearby.
- Color: Armor Black – A durable and aesthetically pleasing finish.
- Fabric/Material: 4140CM – A strong and reliable steel alloy commonly used in firearm barrels.
- Gas Block Journal Size-Diameter: .750 in – A standard size, allowing for aftermarket gas block options.
- Gun Rail: M-LOK – Provides a lightweight and versatile platform for attaching accessories.
- Gun Type: Rifle – Requires compliance with all NFA regulations if configured as a short-barreled rifle (SBR).
- Gun Make: CMMG – A reputable manufacturer known for quality and innovation.
- Gun Model: CMMG Resolute Mk47 – The specific AR variant that this upper receiver is part of.
- Weight: 3.9 lb – Relatively lightweight for a 7.62x39mm AR upper.
- Condition: New – Ensures you’re receiving a pristine, unfired product.
- Magazine Included: No – Requires a dedicated Mk47 lower receiver and AK-47 magazines.
- Mount Type: M-LOK – The standard for attaching accessories to the handguard.
Performance & Functionality
The CMMG Mk47 Banshee Upper Receiver Group performs admirably, delivering surprising accuracy for an 8-inch barrel. With quality ammunition, I was able to consistently achieve 2-3 MOA groups at 100 yards. The short barrel does result in a significant loss of velocity compared to longer 7.62x39mm rifles, impacting effective range.
One notable weakness is its potential sensitivity to lower-quality or steel-cased ammunition, which can sometimes lead to failures to extract. However, with proper lubrication and quality magazines, this issue can be minimized. Overall, the Mk47 Banshee meets my expectations for a compact and potent AR-platform upper.
Design & Ergonomics
The build quality is excellent, with tight tolerances and a smooth, durable finish. The weight is manageable, and the M-LOK handguard provides a comfortable and secure grip.
The Mk47 Banshee utilizes standard AR-15 controls, so there’s no significant learning curve for anyone familiar with the platform. However, the shorter barrel and pistol-length gas system do result in increased felt recoil and muzzle flash compared to a standard AR-15.
Durability & Maintenance
The 4140CM barrel and durable finish suggest that the Mk47 Banshee will last for many years with proper care. Regular cleaning and lubrication are essential, especially after using corrosive or steel-cased ammunition. The AR-15 platform is relatively easy to maintain and repair, with readily available parts and resources.
Accessories and Customization Options
The CMMG Mk47 Banshee Upper Receiver Group is highly customizable, thanks to its M-LOK handguard and compatibility with standard AR-15 accessories. A wide variety of optics, lights, lasers, and grips can be easily attached.
It’s worth noting that this upper requires a dedicated Mk47 lower receiver that accepts AK-47 magazines. These lowers are available from CMMG and other manufacturers. A quality muzzle device, such as a flash hider or suppressor, is also highly recommended to mitigate the significant muzzle flash produced by the short barrel.
Pros and Cons of CMMG Mk47 Banshee Upper Receiver Group
Pros
- Compact and Maneuverable: Its 8-inch barrel makes it ideal for close-quarters situations and vehicle deployment.
- 7.62x39mm Caliber: Offers significantly more stopping power than 5.56, with relatively affordable ammunition.
- AR-15 Compatibility: Familiar controls and extensive aftermarket support.
- Durable Construction: Built with high-quality materials for long-lasting performance.
- M-LOK Handguard: Provides a versatile platform for attaching accessories.
Cons
- Potential Ammunition Sensitivity: May experience issues with low-quality or steel-cased ammunition.
- Requires Dedicated Lower: Needs a specific Mk47 lower receiver that accepts AK-47 magazines.
Who Should Buy CMMG Mk47 Banshee Upper Receiver Group?
The CMMG Mk47 Banshee Upper Receiver Group is perfect for individuals seeking a compact and powerful AR-platform firearm, particularly for home defense, vehicle carry, or hog hunting. It’s also a great option for those who appreciate the 7.62x39mm cartridge and want the modularity of the AR-15 platform.
This product may not be ideal for long-range shooters or those who prioritize absolute reliability with all types of ammunition.
Must-have accessories include a quality optic (red dot or holographic sight), a reliable Mk47 lower receiver, and high-quality AK-47 magazines. A flash hider or suppressor is also highly recommended.
Conclusion on CMMG Mk47 Banshee Upper Receiver Group
The CMMG Mk47 Banshee Upper Receiver Group is a well-engineered and potent addition to the AR-15 platform. It delivers a unique combination of compact size, hard-hitting firepower, and modularity.
At $919.99, the price is justified by the quality of the components and the unique capabilities of the Mk47 Banshee.
I would personally recommend it to anyone looking for a compact and powerful AR-platform firearm. If you’re ready to experience the best of both worlds, the CMMG Mk47 Banshee Upper Receiver Group is worth a serious look.