Gun Science: How quiet is subsonic ammunition?
This video tests the sound reduction of subsonic .22 LR ammunition with a suppressor. Unsuppressed, the rifle registered 94.5-95.1 dB, comparable to a jackhammer. With a Gemtech HALO suppressor, the noise dropped significantly to 68.1-73.6 dB, similar to TV audio. The test highlights the effectiveness of suppressors in reducing firearm noise for .22 caliber rifles.









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