I think no one would play this game if this was realistic.. Think about it, there would be no perks like instant reload or instant health regen on kill. Also if it was realistic, u would get one shot by a sniper if u were hit anywhere in the middle of ur body. Also, there would be no story either (not saying destiny has a story). There is no such aliens like Hive or Vex or cabal. ( cabals could be Americans... If you think about it, Americans are 800 pounds and highly militarized). So yea, if u want a realistic game, go play dress up games.