Drag and drop the UserData folder into your BONELAB directory.
Go to your BONELAB directory go to "...\UserData\CustomAudio..." Then Delete all the audio
If you would the Cold war Sounds Click here ---> https://bonelab.thunderstore.io/package/Alfi/Black_Ops_CW_Reload_Soundpack/
Activison/Infinity Ward: For all Audio