Well, lemme tell you that i had this problem ever since I started to play APB: Reloaded, and it's super annoying to the point that I literally fed up so yeah.
This happens only when i'm using Assault Rifles, no matter how slow I shoot, i literally hear 2 shots knowing that I shot only once on the wall. I tried everything and nothing helped me fixing this got damn bug once it for all. All i want is to get rid of this soung bud ASAP.
Here's a video of my problem:
I hope that someone could help me to get rid of this thing.