Theres one thing in RE3 and RA2 badly made.. AK-47 was made with the help of a German Nazi prisoner of war in a soviet camp... he Kalashnikov(the guy who made AK-47) took the idea from a MP44. So, if Einstein went to the past and prevented WW2, according to the RA2 history, the AK-47 shouldn't exist in the Red Alert universe.