Uhm,... Automatic weapons are CURRENTLY illegal. As are RPG's. In THIS environment, "gassing up your tank" is DEFINITELY cost prohibitive. AND requires a special permit and ONLY Korean war or OLDER tanks can be owned. Oh and you NEED to be a millionaire to afford one.
Concerning semi-automatic weapons,.. they only shoot as FAST as you can pull the trigger.
Semi-automatic weapons can NOT be made to fire "full auto" either.
Trying to spread mis information and "straw-man" arguments is ALL you have LEFT.