Noticed all of this as well. Scout rifles in particular upset me. Also, notice how you rack the bolt every time you reload. Most times on real firearms, after emptying a magazine, the slide or bolt are automatically locked to the rear and just need to be released once a new mag is inserted, not racked like you do. I know the people who said "go back to cod" below are going to say it again but one instance in game where a crazy amount of detail has been put in is the modern warfare series. When reloading an m4, if the mag has been emptied the player character inserts a new one and hits the bolt release button on the side. If the mag has not been totally emptied, then when a new mag is inserted the bolt release is not pushed, because it's still forward, because there's still a round in the chamber.