I lately noticed how now I require up to 3 shots from any weapon to an enemy to actually do any damage to him, for example today I was playing Oilfield and shot a bot directly with an SKS 3 times, yet only the 4th shot actually killed him. I had normal 40 ping and no lag issues, only these ones.
They said it was a hybrid system; Hitscan up close and then after a certain range the shots will have bullet physics applied to them.
https://www.youtube.com/watch?v=ieQC-34xZCc (at 25:08)
Yet, this video show that's not true (unless I'm mistaken with how hitscan works)
I have also traded kills in cqb ingame myself. This shouldn't happen.