This addon replaces Assault Rifle shooting sound to a silenced shooting sound
How to install sound addon?
Same like campaign addon. Plus after installation paste this into Developer Console:
Press Enter to execute the pasted string. Developer Console can be enabled in Keyboard settings. To open developer console use tilde key (~).
The game will rebuild sound cache and close itself to apply changes.
To uninstall simply delete the addon file and again enter in console:
Restart the game.