CMMG, Inc Ejection Port Cover Kit Review

Let’s Dive into CMMG, Inc Ejection Port Cover Kit

The CMMG, Inc Ejection Port Cover Kit might seem like a small and insignificant part, but it plays a vital role in protecting the internals of your AR-15. This kit includes the ejection port cover, ejection port rod, and ejection port spring, all necessary components for a functional dust cover assembly. As someone who has built, modified, and maintained countless AR-15s over the last decade, I know firsthand the importance of having reliable and properly functioning components.

What led me to this product was a recent build where I needed to source quality small parts. A missing or damaged ejection port cover can lead to malfunctions and reduce the lifespan of critical components. My initial thoughts were that it was a no-frills, functional part, but I was curious to see the quality and ease of installation.

There are other similar ejection port cover kits on the market, some even cheaper. I chose the CMMG, Inc Ejection Port Cover Kit because of CMMG‘s reputation for producing reliable AR-15 components. My first impression was positive; the parts appeared well-made and ready for installation.

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Real-World Testing: Putting CMMG, Inc Ejection Port Cover Kit to the Test

First Use Experience

I installed the CMMG, Inc Ejection Port Cover Kit on a new AR-15 build destined for use as a patrol rifle. The installation was straightforward and quick, thanks to the included components fitting perfectly. During the first range session, I fired approximately 300 rounds in dry, dusty conditions.

The ejection port cover functioned flawlessly, snapping open and closed smoothly with each firing sequence. There were no signs of binding or sticking, even after prolonged use. The cover kept dust and debris out of the action, which is essential for reliable operation.

Extended Use & Reliability

After several weeks of consistent use and approximately 1000 rounds fired, the CMMG, Inc Ejection Port Cover Kit continues to perform admirably. There are no noticeable signs of wear and tear on the ejection port cover. Maintenance is simple; a quick wipe down with a lightly oiled cloth is all it takes to keep it in good condition.

Compared to cheaper, generic ejection port covers I’ve used in the past, this one feels more robust and reliable. The spring tension remains consistent, ensuring the cover stays closed when it should. I’ve definitely had other, cheaper ejection port covers that had their springs give out much sooner.

Breaking Down the Features of CMMG, Inc Ejection Port Cover Kit

Specifications

The CMMG, Inc Ejection Port Cover Kit includes the following:

• Ejection Port Cover: Made from 6061-T6 Aluminum for durability and lightweight.
• Ejection Port Rod: Steel rod that secures the cover to the upper receiver.
• Ejection Port Spring: Provides tension for the cover to open and close.
• Finish: Black.

These specifications matter because they contribute to the overall reliability and longevity of the AR-15. The 6061-T6 Aluminum construction ensures the cover can withstand the rigors of regular use. A properly tensioned spring is essential for consistent operation.

Performance & Functionality

The CMMG, Inc Ejection Port Cover Kit performs its job perfectly by protecting the AR-15’s internal components from dust, dirt, and debris. It prevents malfunctions caused by foreign objects entering the action. The cover opens and closes smoothly, allowing for unobstructed ejection of spent casings.

The kit’s strength lies in its simplicity and reliability. There’s nothing fancy about it, but it does its job effectively. There is little room for improvement; it does exactly what it’s supposed to do.

Design & Ergonomics

The design is standard for an AR-15 ejection port cover. The black finish blends seamlessly with most upper receivers. The parts are lightweight and do not add any noticeable bulk to the rifle.

The installation is straightforward and requires no special tools. The cover is easy to operate, even with gloved hands.

Durability & Maintenance

The 6061-T6 Aluminum construction ensures the ejection port cover will last a long time. The steel rod and spring are also durable and resistant to corrosion. Maintenance is minimal, requiring only occasional cleaning and lubrication.

I anticipate this kit will outlast many other components on my AR-15. Its simple design and quality materials contribute to its long-term reliability.

Accessories and Customization Options

This kit is a standalone replacement part and does not have any specific accessories or customization options. It is designed to be compatible with any standard AR-15 upper receiver. Some users may choose to Cerakote or otherwise refinish the cover to match a custom rifle build.

It is compatible with any aftermarket forward assist assemblies, as the ejection port cover functions independently. The design allows for seamless integration with various AR-15 configurations.

Pros and Cons of CMMG, Inc Ejection Port Cover Kit