Very often automatic gunfire in a bit of a distance (>100m) sounds bugged in a way that you hear a way too fast firing rate, or overlapping shots.
It sounds like a burst of 10 bullets is ringing out within less then half a second.
Faster than an old mg42.
Also, as i mostly play i a group, we often realise that some gun shots cannot be heard by all of us. This is happening very often