The Best 9mm Carbine of 2017 (CMMG Guard)

Published on November 14, 2017
Duration: 11:32

This expert review of the CMMG Guard 9mm carbine highlights its innovative Radial Delayed Blowback system, which offers reduced recoil and improved reliability compared to traditional blowback designs. The presenter, an expert firearms instructor, details its technical specifications, including a 1:10 twist rate barrel and 1/2x36 threading, and discusses its performance over 1500 rounds with minimal malfunctions. The review also covers ammunition compatibility and potential suppressor integration challenges.

Quick Summary

The CMMG Guard 9mm carbine features an innovative Radial Delayed Blowback system, offering reduced recoil and improved reliability over 1500+ rounds with only one malfunction. Its lighter 15 oz bolt carrier group minimizes reciprocating mass, and the 1:10 twist barrel stabilizes various 9mm loads. However, its 1/2x36 barrel threading may require adapters for common suppressors.

Chapters

  1. 00:35Introducing CMMG Guard 9mm
  2. 01:39Design and Features Overview
  3. 01:59Radial Delayed Blowback System
  4. 02:28Blowback System Comparison
  5. 03:42Reduced Reciprocating Mass
  6. 04:2445 ACP to 9mm Conversion
  7. 04:45Ammunition and Barrel Twist Test
  8. 06:36Barrel Threading and Suppressors
  9. 07:09Second Shooter Experience
  10. 09:27Field Testing and Reliability
  11. 10:28Future Improvements and Suppressor Test

Frequently Asked Questions

What makes the CMMG Guard 9mm carbine's operating system unique?

The CMMG Guard utilizes a Radial Delayed Blowback system. This design rotates the bolt face to delay the opening of the breech, which effectively reduces felt recoil and enhances reliability compared to traditional straight blowback systems found in many 9mm carbines.

How reliable is the CMMG Guard 9mm carbine?

The CMMG Guard 9mm carbine demonstrated significant reliability during testing, firing over 1500 rounds with only a single malfunction reported. This occurred specifically when using factory-loaded ammunition, indicating a high level of operational consistency.

What are the advantages of the CMMG Guard's lighter bolt carrier group?

The CMMG Guard features a bolt carrier group and buffer assembly weighing 15 oz, considerably less than the typical 1 lb 3.0 oz of standard 9mm carbines. This reduction in reciprocating mass leads to lower perceived recoil and potentially faster follow-up shots.

What is the barrel threading on the CMMG Guard 9mm carbine, and what are the implications?

The CMMG Guard 9mm carbine comes with a 1/2x36 barrel thread. This is important because most 9mm suppressors use a 1/2x28 thread, meaning direct attachment may not be possible without an adapter or a different barrel configuration.

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