CMMG 9mm GUARD

Published on December 8, 2017
Duration: 27:36

This guide details how to tune the CMMG Guard 9mm pistol using its proprietary Action Tuning Kit. The Radially Delayed Blowback system requires specific weight adjustments in the bolt carrier group to optimize reliability with different ammunition types, from subsonic to +P loads. Proper tuning, combined with compatible magazines and ammunition selection, is crucial for consistent performance, especially when suppressed. The review highlights the importance of testing defensive ammunition for function.

Quick Summary

The CMMG Guard 9mm features a unique 'Radially Delayed Blowback' operating system, offering reduced recoil and a lighter bolt compared to standard blowback designs. It performs exceptionally well suppressed, staying below 140dB, and includes an Action Tuning Kit to optimize reliability with various ammunition types.

Chapters

  1. 00:00Introduction and Initial Shooting
  2. 00:51Radially Delayed Blowback System Explained
  3. 02:31Sound Metering and Suppressor Performance
  4. 03:07Pistol Configuration and Components
  5. 04:07Barrel and Threading
  6. 04:59Pricing and High-End Features
  7. 06:49Magazine Compatibility and Reliability
  8. 08:53Action Tuning Kit Explained
  9. 13:31Final Assessment

Frequently Asked Questions

What is the operating system of the CMMG Guard 9mm?

The CMMG Guard 9mm utilizes a proprietary 'Radially Delayed Blowback' system. This design features a bolt with lugs that rotate out of the barrel extension, effectively slowing the bolt carrier group's rearward movement for reduced recoil and a lighter bolt.

How does the CMMG Guard 9mm handle suppressed shooting?

The CMMG Guard 9mm performs exceptionally well suppressed. Sound metering data shows that even with various 9mm loads, the noise levels at the shooter's ear remain below the 140dB OSHA threshold, making it very hearing-safe.

Can the CMMG Guard 9mm be tuned for different ammunition?

Yes, the CMMG Guard 9mm comes with an Action Tuning Kit containing weights (1oz, 2oz, 3.5oz) that can be added to the bolt carrier group. This allows users to optimize the firearm's cycling for specific ammunition types, from subsonic to +P loads.

What is the typical price range for the CMMG Guard 9mm?

The CMMG Guard 9mm pistol has an MSRP starting above $1,300. This price reflects its premium components, including an ALG trigger, Magpul furniture, and the specialized Radially Delayed Blowback operating system.

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