Good posts.....    WASR10's are notorious for this problem. They do not have the magwell dimples that keep the mag where it needs to be while functioning. Google WASR10 magwell fix and you will find tons of info.    Also, like others have mentioned you can clean the gas tube and change the extractor. Start with the magwell as I bet your rounds are getting jammed against the feed ramp before going into the chamber right?    If they are not fully ejecting then it has to be a very stiff recoil spring or a bad ejector.    Don't give up on the AK they are an awesome close quarters gun.