02 Jul 11, 12:45AM
I'm not sure how the "mute specific sounds" menu lists it ("your weapon shots" / "your AR shots") so if you can't mute just the AR and SMG you can always just rename/delete/move the audio files for AR and SMG (assault.wav and sub.wav, I believe) or even better, place a sound file that is silent in your mod folder for these files.