I’ve seen other animations in the past that didn’t get into as much detail as this one.  In this video you get a pretty good demo of how the various parts work during the firing and automated loading of the AK-47 but they got the trigger wrong, etc.  This one shows the disconnector and trigger hook operating in the right manner for example.  I’m posting it because I think it always helps to understand what is going on inside a firearm for when you want to tune it, figure out what might be going wrong, and so forth.