9mm suppressed. Supersonic VS subsonic sound. @DeadAirSilencers Mojave 9 silencer

Published on March 21, 2025
Duration: 0:26

This guide demonstrates the audible difference between supersonic and subsonic 9mm ammunition when fired through a suppressed firearm. Expert instruction from Ghost Mountain Group highlights the importance of ammunition type in suppressed shooting, using a Dead Air Mojave 9 silencer for clear sound comparison. The video emphasizes safe firearm handling and the practical application of sound suppression technology.

Quick Summary

The primary audible difference between suppressed supersonic and subsonic 9mm rounds is the sonic crack produced by supersonic bullets. Subsonic ammunition, traveling below the speed of sound, eliminates this crack, resulting in a quieter overall sound signature when fired through a suppressor like the Dead Air Mojave 9.

Chapters

  1. 00:00Intro & Ammunition Setup
  2. 00:05Suppressor & Firearm Setup
  3. 00:13Firing Demonstration
  4. 00:20Listener Feedback

Frequently Asked Questions

What is the main difference in sound between suppressed supersonic and subsonic 9mm rounds?

The main audible difference is the sonic crack produced by supersonic rounds as they exceed the speed of sound. Subsonic rounds, traveling below this threshold, eliminate this crack, resulting in a quieter overall sound signature when suppressed.

Which suppressor was used in the demonstration of 9mm sound differences?

The demonstration utilized the Dead Air Mojave 9 silencer. This pistol suppressor was attached to a 9mm firearm to effectively showcase the acoustic variations between supersonic and subsonic ammunition types.

How does ammunition velocity affect suppressed firearm sound?

Ammunition velocity is crucial. Supersonic rounds create a sonic crack, which a suppressor only partially mitigates. Subsonic rounds, by staying below the speed of sound, avoid this crack entirely, leading to a significantly quieter report when used with a suppressor.

What is the purpose of alternating supersonic and subsonic rounds in a magazine for testing?

Alternating rounds allows for a direct, side-by-side auditory comparison within the same firing sequence. This method helps listeners easily discern the distinct sound profiles of supersonic versus subsonic ammunition through a suppressor.

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