Also confirmed, has happened to me couple of times with M4 and shotgun. I seldom end up shooting from prone position, so I've usually forgot this bug the next time I'm supposed to shoot.

Please fix the position of bullets leaving the barrel.

Also, the further improve the aiming system, I would suggest using the "dynamic crosshair"-thingie from Arma 3, so that if you aim at a target/wall/whatever right in front of you, the crosshair acts accordingly showing where the bullet will hit like in http://www.youtube.com/watch?v=LrydvG8DQIE .

Very frustrating. Had noticed this before "on a small scale", but yesterday when tried to ambush some people at Rify, at first I had crouched behind a couple of rocks so that I should have been able to shoot over the them without a question considering where my crosshair was. First round richocheted off the "rocks" (air above them), then I stood up so that my crosshair was ~1,5 metres above the rocks but still every bullet richocheted off the rock's hitboxes right in front of me.