Re: Poor challenges! Why I have to sit back to unlock VSS Vintorez?

@Estynytapa_Haiku It's not that different, and in fact these challenges are far more simple than unlocking guns in some previous games.

As @Psubond mentioned, you can complete it in a single round in single-player/co-op, be grateful you can do it there instead of forcing it through play you may not be comfortable with in multiplayer.