CMMG 9mm GUARD
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.













