First Impressions of CMMG Mk4/AR-15 Forward Assist Upper Receiver Assembly
The CMMG Mk4/AR-15 Forward Assist Upper Receiver Assembly is a crucial component for any AR-15 build or upgrade, offering both classic aesthetics and functional reliability. CMMG is a respected name in the AR-15 world, and this upper receiver assembly promises to deliver the quality and performance that enthusiasts expect. It’s more than just a piece of metal; it’s the foundation upon which accuracy and dependability are built.
I was looking to upgrade an older AR-15 build that was lacking a forward assist. A reliable upper receiver with a forward assist is vital for ensuring proper chambering in adverse conditions. Unboxing the CMMG Mk4/AR-15 Forward Assist Upper Receiver Assembly revealed a clean, well-machined piece. The Armor Black Cerakote finish is smooth and even, and the forged 7075-T6 aluminum feels robust in hand.
Compared to a similar Aero Precision upper receiver I’ve used, the CMMG assembly feels slightly more refined in its finish. I chose this CMMG upper specifically because of CMMG’s reputation for quality control and the availability of the forward assist. My initial impression is definitely excitement; this upper looks like it will significantly improve the reliability of my AR-15.
Real-World Testing: Putting CMMG Mk4/AR-15 Forward Assist Upper Receiver Assembly to the Test
First Use Experience
I first tested the CMMG Mk4/AR-15 Forward Assist Upper Receiver Assembly at an outdoor shooting range. The weather was slightly damp, creating a mildly challenging environment for the AR-15. Installation was straightforward, fitting snugly onto my existing lower receiver.
The forward assist proved immediately useful, as I encountered a few instances of rounds not fully chambering due to the damp conditions. A quick press of the forward assist ensured proper seating, allowing me to continue shooting without significant interruption. There were no initial issues; the upper performed as expected.
Extended Use & Reliability
After several months of regular use, the CMMG Mk4/AR-15 Forward Assist Upper Receiver Assembly has held up remarkably well. There are no signs of excessive wear and tear, even after several hundred rounds. The Cerakote finish is resisting scratches and abrasions effectively.
Cleaning and maintenance are simple. A quick wipe-down after each range session keeps the upper receiver in excellent condition. Compared to my previous upper receiver, this one from CMMG offers a noticeably smoother and more reliable operation, particularly in less-than-ideal conditions.
Breaking Down the Features of CMMG Mk4/AR-15 Forward Assist Upper Receiver Assembly
Specifications
The CMMG Mk4/AR-15 Forward Assist Upper Receiver Assembly is built to meet the demands of serious AR-15 users. Its key specifications include:
- Manufacturer: CMMG
- Color: Armor Black
- Finish: Cerakote
- Fabric/Material: Forged 7075-T6 Aluminum
- Gun Make: AR Platform
- Gun Model: CMMG Mk4, AR-15
- Condition: New
The use of forged 7075-T6 aluminum ensures high strength and durability. The Cerakote finish provides excellent corrosion resistance and a sleek appearance. These specifications are important because they contribute to the receiver’s longevity and reliability in various environmental conditions.
Performance & Functionality
The CMMG Mk4/AR-15 Forward Assist Upper Receiver Assembly performs its job exceptionally well. The forward assist is a crucial feature, ensuring that rounds are fully chambered even when conditions aren’t perfect. Accuracy is consistent, and the receiver provides a solid platform for mounting optics.
Its strengths lie in its reliability and robust construction. The only potential area for improvement might be offering it with a wider variety of Cerakote color options. It definitely meets my expectations for a high-quality upper receiver.
Design & Ergonomics
The CMMG Mk4/AR-15 Forward Assist Upper Receiver Assembly boasts a well-thought-out design. The forged aluminum feels substantial without being overly heavy. The Armor Black Cerakote finish is both aesthetically pleasing and functional.
The upper receiver is user-friendly, requiring no special tools or skills for installation. There is virtually no learning curve.
Durability & Maintenance
The forged 7075-T6 aluminum and Cerakote finish ensure that this upper receiver is built to last. Regular cleaning and lubrication will keep it functioning smoothly for years to come. Maintenance is simple.
Accessories and Customization Options
The CMMG Mk4/AR-15 Forward Assist Upper Receiver Assembly is compatible with a wide range of AR-15 accessories. This includes various optics, charging handles, and dust covers. Its universal design allows for seamless integration with other aftermarket parts.
Pros and Cons of CMMG Mk4/AR-15 Forward Assist Upper Receiver Assembly
Pros
- Forged 7075-T6 Aluminum construction for superior strength and durability.
- Armor Black Cerakote finish provides excellent corrosion resistance and aesthetics.
- Forward assist functionality ensures reliable chambering in adverse conditions.
- Compatible with a wide range of AR-15 accessories for customization.
- Easy to install and maintain.
Cons
- Limited color options (currently only available in Armor Black).
- May be slightly more expensive than some other basic upper receivers.
Who Should Buy CMMG Mk4/AR-15 Forward Assist Upper Receiver Assembly?
The CMMG Mk4/AR-15 Forward Assist Upper Receiver Assembly is perfect for AR-15 enthusiasts looking for a reliable and durable upper receiver with forward assist functionality. It’s also ideal for those building a new AR-15 or upgrading an existing one. This product will greatly benefit those who need their rifle to function reliably in any environment.
Those on an extremely tight budget might consider a less expensive option without the forward assist. A quality bolt carrier group and charging handle are must-have accessories to complete the build.
Conclusion on CMMG Mk4/AR-15 Forward Assist Upper Receiver Assembly
The CMMG Mk4/AR-15 Forward Assist Upper Receiver Assembly is a top-tier component that delivers on its promises of reliability and durability. The price is justified by the quality of materials and construction. I would absolutely recommend it to anyone looking to build or upgrade their AR-15.
It’s a solid investment that will provide years of dependable service. Upgrade your AR-15 today and experience the difference a quality upper receiver can make!