Just to point out the many flaws of most games. I have hardly seen any game where the weapons are perfect in realism. One of my favorite games, Black, had a regular AR mag that held 95 rounds and was wrong in operation. Many guns are like that in many games.

Yeah, but Black was forgiven for having amazing explosion audio on a decent sound system. DICE is about the best with realistic weapons, imo. Unless you're looking for true sim quality, in which case Bohemia Interactive (ARMA series) are nearly perfect. Though there are some mods for the STALKER series that have incredibly realistic weapons... https://www.youtube.com/watch?v=Pb1tCwxUbRA