3 ways to try do that
1º
You can try get the name of the audio and this name gonna be obfuscated like DF116_SOMETHINGHERE
if you find that you can try get the list id from where the sounds are pull out and find the funtion are used to play the sounds.
2º
also you can try find the timer on the sounds and edit each time on game to find one related to weapons
3º
try get the event trigger and get the function name of that AuidoSourcePlay