CMMG BBL 5.7X28 10.4″ PS90 Review

The CMMG BBL 5.7X28 10.4″ PS90 Made a Bold First Impression

The CMMG BBL 5.7X28 10.4″ PS90 isn’t just another barrel; it’s a gateway to unlocking the full potential of the iconic FN PS90 platform. Offered by CMMG, this barrel allows PS90 owners to convert their rifles into short-barreled rifles (SBRs), offering enhanced maneuverability and a more compact profile. The promise of transforming my PS90 from a somewhat unwieldy carbine into a more manageable SBR piqued my interest.

I’ve always appreciated the futuristic design of the PS90, but the long barrel always felt a bit out of proportion for its bullpup configuration. The search for a more balanced and compact package drove my hunt for a quality SBR barrel. As a long-time firearm enthusiast, I was eager to explore the SBR configuration’s benefits and improve the overall handling of my PS90.

My initial impression upon receiving the CMMG barrel was positive. The matte black finish was uniform and professional looking. The barrel felt solid and well-made. Compared to other aftermarket PS90 barrels I’ve seen online, the CMMG offering seemed to strike the right balance between quality and affordability. While some premium options exist, the CMMG barrel offered a trusted name and a reasonable price point. I was immediately excited to get it installed and see it in action.

Real-World Testing: Putting CMMG BBL 5.7X28 10.4″ PS90 to the Test

First Use Experience

The first range trip with the CMMG BBL 5.7X28 10.4″ PS90 was a blast. I headed to my local outdoor range. I wanted to test the functionality and accuracy of my newly converted SBR. The weather was clear and calm, offering ideal conditions for shooting.

The immediate improvement in handling was noticeable. The shorter barrel made maneuvering the PS90 much easier in tight spaces. Recoil felt similar to the factory barrel, but the overall balance was significantly improved. After ensuring the proper headspace and function, I found that the accuracy was consistent with what I expected from the platform.

Extended Use & Reliability

After several months of consistent use, the CMMG BBL 5.7X28 10.4″ PS90 has proven to be a reliable performer. I’ve put several hundred rounds through it. I have experienced no malfunctions or issues related to the barrel itself. Cleaning is straightforward, and I haven’t noticed any signs of excessive wear or corrosion.

The matte black finish has held up well, showing only minor scuffs from normal use. Compared to my previous experience with the factory barrel, the CMMG barrel hasn’t disappointed in the slightest. It offers the improved handling I was looking for without sacrificing reliability or accuracy. The shorter length is now my preferred configuration for the PS90.

Breaking Down the Features of CMMG BBL 5.7X28 10.4″ PS90

Specifications

The CMMG BBL 5.7X28 10.4″ PS90 boasts the following key specifications:

• Caliber: 5.7x28mm. This ensures compatibility with the standard PS90 ammunition.
• Barrel Length: 10.4 inches. This shorter length is the primary factor in turning the PS90 into an SBR.
• Twist Rate: 1:9. This twist rate is optimized for stabilizing the 5.7x28mm round.
• Material: Steel. The robust steel construction ensures durability and longevity.
• Finish: Black. The black finish provides corrosion resistance and a sleek appearance.

These specifications are crucial for achieving optimal performance with the PS90. The 10.4-inch barrel length dramatically improves maneuverability. The 1:9 twist rate is vital for accuracy with the 5.7x28mm round. The durable construction ensures it will stand up to repeated use.

Performance & Functionality

The CMMG BBL 5.7X28 10.4″ PS90 excels in its primary function: transforming the PS90 into a more compact and maneuverable SBR. Accuracy remains consistent with the factory barrel, with no noticeable degradation in performance at typical engagement ranges. Its ease of installation and reliable performance make it a worthwhile upgrade.

The barrel’s primary strength lies in its ability to drastically improve the handling of the PS90 without sacrificing accuracy. One potential area for improvement might be offering different finish options to match various PS90 configurations. Overall, the CMMG barrel meets and exceeds expectations for an SBR conversion barrel.

Design & Ergonomics

The design of the CMMG BBL 5.7X28 10.4″ PS90 is straightforward and functional. The matte black finish matches the aesthetics of most PS90 receivers. The barrel’s weight is comparable to the factory barrel.

Installation is relatively simple, as noted by other users. I was able to install it with minimal tools and effort. The overall design is user-friendly, with no significant learning curve involved.

Durability & Maintenance

Based on my experience and the experiences of other users, the CMMG BBL 5.7X28 10.4″ PS90 is built to last. The steel construction and corrosion-resistant finish ensure longevity. Maintenance is simple, requiring only regular cleaning and lubrication like any other firearm barrel.

The barrel appears to be easily maintained and repaired, should the need arise, thanks to its simple design. With proper care, the CMMG barrel should provide years of reliable service.

Accessories and Customization Options

The CMMG BBL 5.7X28 10.4″ PS90 itself doesn’t come with any accessories. However, it opens up customization possibilities for the PS90 platform. It allows for the use of shorter muzzle devices and suppressors.

The barrel is compatible with any accessories that are designed for the standard PS90 barrel thread pitch. Common customizations include different muzzle brakes or flash hiders. The SBR configuration also makes the PS90 more suitable for use with certain optics and aiming devices.

Pros and Cons of CMMG BBL 5.7X28 10.4″ PS90