CMMG, Inc Action Tuning Set For Mkg45 Guard Series Review

Let’s Talk About CMMG, Inc Action Tuning Set For Mkg45 Guard Series

The CMMG, Inc Action Tuning Set For Mkg45 Guard Series offers a straightforward yet impactful way to fine-tune the cycling of your CMMG MkG/MkGs GUARD platform. This kit includes various weights that replace the standard buffer weight, allowing you to optimize the action for different ammunition types or when using a suppressor. The ease of installation and the ability to tailor the firearm’s performance make this a compelling option for anyone looking to maximize the potential of their 45 ACP AR pistol or carbine.

I initially sought out this kit because I was experiencing some inconsistencies with my 45 ACP pistol build, particularly with heavier grain ammunition and when running a suppressor. The cycling felt sluggish at times, leading to occasional failures to eject. I hoped this kit would allow me to dial in the action for better reliability.

Upon receiving the Action Tuning Set, I was impressed by its simplicity. The weights felt solid and well-machined, and the inclusion of roll pins was a nice touch, preventing the need to scavenge for replacements. My initial thought was that this was a well-thought-out solution, especially given that it could potentially negate the need for a more expensive adjustable gas block.

Similar products include aftermarket buffers with adjustable weights or entirely new buffer systems. I chose the CMMG kit because it seemed like the most direct and cost-effective way to address my specific issue without overhauling the entire buffer system. It offered a level of control without the complexity of some other options.

My first impression was one of cautious optimism. The kit itself seemed well-made, but I was eager to see if it would actually make a noticeable difference in the firearm’s performance. I was hoping for a tangible improvement in cycling smoothness and reliability.

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Real-World Testing: Putting CMMG, Inc Action Tuning Set For Mkg45 Guard Series to the Test

First Use Experience

I tested the CMMG, Inc Action Tuning Set For Mkg45 Guard Series primarily at an outdoor shooting range, focusing on a variety of 45 ACP ammunition, including standard pressure loads, +P rounds, and subsonic ammunition used with a suppressor. The conditions were fairly dry and mild, around 70 degrees Fahrenheit. The goal was to see how each weight affected cycling and reliability with different ammo types.

The most immediate difference was felt when using the lighter weights with the subsonic and suppressed loads. With the standard weight, cycling was inconsistent, often failing to lock back on an empty magazine. Switching to the lighter weights noticeably improved cycling, and the pistol locked back reliably.

Installation was straightforward, requiring only basic tools such as a punch and hammer. No special expertise was needed, but care was definitely needed to avoid damaging the roll pins or buffer tube. The changes with each weight were noticeable from the first shot.

Extended Use & Reliability

After several range sessions spanning a few months, the CMMG, Inc Action Tuning Set For Mkg45 Guard Series has held up exceptionally well. There are no signs of wear or deformation on the weights themselves, and the roll pins remain secure. The finish on the weights has proven to be durable, showing no signs of chipping or corrosion.

Maintenance is virtually nonexistent. The weights require no special cleaning or lubrication. The buffer tube and components are cleaned alongside the rest of the firearm after each range visit, but the weights themselves remain untouched.

Compared to my previous experience without the tuning kit, the difference is night and day. Before, I experienced frequent malfunctions with suppressed or heavier grain ammunition. Now, the pistol cycles reliably with a wider range of ammunition, and the felt recoil is noticeably smoother, especially with the lighter weights.

Breaking Down the Features of CMMG, Inc Action Tuning Set For Mkg45 Guard Series

Specifications

• The CMMG, Inc Action Tuning Set For Mkg45 Guard Series includes three different weights: a 1 oz weight, a 2 oz weight, and a 3.4 oz weight (which is the standard 9mm weight). Each weight is designed to replace the factory buffer weight within a CMMG MkG/MkGs GUARD firearm.
• The variety of weights allows the user to fine-tune the cycling speed of the bolt, optimizing it for different ammunition types and operating conditions. The set also includes three 0.250×0.625-inch roll pins for securing the weight within the buffer.
• The weights are crucial for ensuring reliable cycling, especially with ammunition that produces varying levels of gas pressure. The inclusion of roll pins ensures the weights can be securely installed without the need for guesswork.

Performance & Functionality

• The Action Tuning Set excels at allowing users to optimize the cycling of their CMMG MkG/MkGs GUARD firearm. By swapping out the standard weight with a lighter or heavier one, the bolt’s speed can be adjusted to match the ammunition being used, reducing recoil and malfunction probability.
• The kit’s strength lies in its simplicity and effectiveness. Its weakness is that it only works with CMMG’s delayed blowback system and isn’t universally compatible.
• The kit met and exceeded my expectations by greatly improving the reliability of my 45 ACP pistol build with various ammunition types and a suppressor. It effectively addressed the cycling issues I was experiencing.

Design & Ergonomics

• The CMMG, Inc Action Tuning Set For Mkg45 Guard Series weights are constructed from durable materials with a robust finish designed to withstand repeated use. The weights are precisely machined to fit seamlessly within the buffer.
• The kit is very user-friendly, requiring only basic tools and minimal technical expertise to install. There is a minimal learning curve; however, some experimentation is required to find the optimal weight for a specific setup.

Durability & Maintenance

• The CMMG, Inc Action Tuning Set For Mkg45 Guard Series is designed for longevity and will likely outlast many other components in the firearm. The durable materials and robust finish ensure that the weights can withstand the constant impact and friction of cycling.
• Maintenance is virtually nonexistent, requiring only occasional cleaning alongside the rest of the firearm. No special tools or cleaning agents are required.

Accessories and Customization Options

• The CMMG, Inc Action Tuning Set For Mkg45 Guard Series itself doesn’t come with any additional accessories beyond the weights and roll pins. The primary customization aspect is the ability to swap the weights themselves.
• **While the kit is designed specifically for the *CMMG* MkG/MkGs GUARD platform, it can be used in conjunction with other aftermarket buffer tubes and springs, provided they are compatible with the CMMG system.** There is also no impact on optic or grip choices.

Pros and Cons of CMMG, Inc Action Tuning Set For Mkg45 Guard Series

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Who Should Buy CMMG, Inc Action Tuning Set For Mkg45 Guard Series?

• The CMMG, Inc Action Tuning Set For Mkg45 Guard Series is perfect for CMMG MkG/MkGs GUARD owners who want to optimize their firearm’s cycling for various ammunition types, including subsonic rounds and +P loads. This is especially beneficial for those who use suppressors or frequently switch between different types of ammunition.
• **Those who are happy with their *CMMG* MkG/MkGs GUARD’s factory performance and primarily shoot standard pressure ammunition may not need this product.** Additionally, those unfamiliar with basic firearm maintenance and disassembly may find the installation process challenging.
• A must-have accessory is a set of quality punches for installing the roll pins without damaging the buffer tube or receiver. A good gunsmithing hammer will also aid in the installation process.

Conclusion on CMMG, Inc Action Tuning Set For Mkg45 Guard Series

The CMMG, Inc Action Tuning Set For Mkg45 Guard Series offers a simple yet highly effective way to optimize the cycling of your CMMG MkG/MkGs GUARD firearm. For a modest investment, you gain the ability to fine-tune the action for various ammunition types and operating conditions.

The price is definitely justified, considering the significant improvement in reliability and performance it provides. This is especially true for those who use suppressors or frequently shoot a variety of different loads.

I would absolutely recommend the CMMG, Inc Action Tuning Set For Mkg45 Guard Series to anyone looking to enhance the performance of their CMMG MkG/MkGs GUARD platform. If you want more control over your firearm’s performance, this is the perfect, affordable place to start!