First Impressions of CMMG ZEROED .308Win Polymer Ejection Port Cover
The ejection port cover, often overlooked, is a crucial component in the AR-15 platform. It protects the rifle’s internals from dust, debris, and the elements. Today, we’re diving deep into the CMMG ZEROED .308Win Polymer Ejection Port Cover, a seemingly simple part with the potential to significantly impact your rifle’s reliability.
As someone who’s spent over a decade tinkering with and relying on AR platforms in demanding environments, from dusty training ranges to damp hunting expeditions, I understand the importance of even the smallest components. I was looking for a lightweight, durable, and cost-effective replacement for a worn-out steel ejection port cover on my .308 AR. This model promised all of those things.
Upon receiving the CMMG ZEROED .308Win Polymer Ejection Port Cover, I was immediately struck by its minimalist design. The polymer felt surprisingly robust, not flimsy like some other aftermarket options I’ve encountered. Compared to a standard steel ejection port cover, it’s noticeably lighter.
Several polymer ejection port covers exist on the market, including offerings from Magpul and Strike Industries. I ultimately chose the CMMG version because of its reputation for quality and the CMMG brand’s overall commitment to reliable AR components. Initial impression? I was cautiously optimistic, eager to see how it would perform under real-world conditions.
Real-World Testing: Putting CMMG ZEROED .308Win Polymer Ejection Port Cover to the Test
First Use Experience
My first test of the CMMG ZEROED .308Win Polymer Ejection Port Cover was at an outdoor shooting range. The conditions were mildly dusty, a common occurrence at this particular location. Installation was straightforward, requiring no specialized tools or modifications. The cover snapped into place with a satisfying click and seemed to seal the ejection port effectively.
Throughout the range session, I fired approximately 200 rounds of .308 Winchester ammunition. The CMMG ZEROED .308Win Polymer Ejection Port Cover functioned flawlessly. It opened and closed smoothly with each firing sequence. After the session, I noticed a slight accumulation of dust on the outside of the cover, indicating it had done its job of protecting the rifle’s internals.
Extended Use & Reliability
After several months of regular use, the CMMG ZEROED .308Win Polymer Ejection Port Cover continues to perform admirably. There are no signs of cracking, chipping, or deformation. The polymer construction has proven to be surprisingly resilient to the rigors of repeated opening and closing.
Cleaning is simple; a quick wipe with a cloth is usually all it takes. Compared to a steel ejection port cover, the polymer material seems less prone to attracting and holding onto dirt and grime. In my experience, it has outperformed a mil-spec steel cover in terms of corrosion resistance, particularly after exposure to humid conditions during a deer hunt.
Breaking Down the Features of CMMG ZEROED .308Win Polymer Ejection Port Cover
Specifications
- Manufacturer: CMMG.
- Fabric/Material: Polymer.
These two specifications define the product. CMMG’s reputation for quality AR components lends confidence. The polymer material is key to its lightweight and corrosion-resistant properties.
Performance & Functionality
The primary function of the ejection port cover is to protect the rifle’s internals from debris. The CMMG ZEROED .308Win Polymer Ejection Port Cover performs this task effectively. It seals the ejection port securely when closed, preventing dust, dirt, and moisture from entering the action.
One potential weakness is that polymer, while durable, isn’t as robust as steel. However, for a component that doesn’t experience significant stress, the polymer construction offers a good balance of weight savings and durability. It met my expectations in daily usage.
Design & Ergonomics
The design is simple and functional. The polymer material is lightweight and comfortable. The cover opens and closes smoothly, with no noticeable friction or binding.
The lack of a complex design means there’s virtually no learning curve. Anyone familiar with the AR-15 platform will be able to install and use this ejection port cover without any difficulty. It is user friendly.
Durability & Maintenance
While long-term durability remains to be seen, the CMMG ZEROED .308Win Polymer Ejection Port Cover has shown no signs of significant wear and tear after months of use. The polymer construction seems resistant to cracking, chipping, and deformation.
Maintenance is minimal. A simple wipe with a cloth is usually sufficient to remove any dirt or grime. No special cleaning solutions or tools are required. It is easy to maintain and clean.
Accessories and Customization Options
The CMMG ZEROED .308Win Polymer Ejection Port Cover is a standalone component and doesn’t come with any accessories. There are no specific customization options directly related to the cover itself.
It is compatible with any standard .308 AR-15 upper receiver. There are no compatibility issues with aftermarket charging handles or other common AR accessories. Be sure to use only parts intended for a .308 AR.
Pros and Cons of CMMG ZEROED .308Win Polymer Ejection Port Cover
Pros
- Lightweight polymer construction.
- Effective protection from dust and debris.
- Easy installation.
- Smooth operation.
- Affordable price.
Cons
- Polymer may not be as durable as steel in extreme conditions.
- Limited customization options.
Who Should Buy CMMG ZEROED .308Win Polymer Ejection Port Cover?
The CMMG ZEROED .308Win Polymer Ejection Port Cover is perfect for .308 AR owners looking for a lightweight, durable, and affordable replacement for their existing ejection port cover. It’s well-suited for hunters, recreational shooters, and anyone who wants to reduce the overall weight of their rifle.
This product might not be the best choice for those who prioritize extreme durability above all else. In that case, a steel ejection port cover might be a better option, although the difference in real-world resilience is minimal. It’s also not a must-have if you’re looking for a fancy, highly customized ejection port cover.
Must-have accessories are not required. The CMMG ZEROED .308Win Polymer Ejection Port Cover is a self-contained replacement part.
Conclusion on CMMG ZEROED .308Win Polymer Ejection Port Cover
The CMMG ZEROED .308Win Polymer Ejection Port Cover is a simple yet effective upgrade for any .308 AR-15. Its lightweight polymer construction, reliable performance, and affordable price make it an excellent value. It’s a testament to the fact that even the smallest parts can make a difference in the overall performance and reliability of your rifle.
At a price of $9.99, the CMMG ZEROED .308Win Polymer Ejection Port Cover offers a significant value proposition. The reduction in weight, combined with its durability and ease of use, makes it well worth the investment.
I would definitely recommend the CMMG ZEROED .308Win Polymer Ejection Port Cover to anyone looking for a reliable and affordable replacement. Upgrade your rifle today and experience the difference!