Well, that would be why we have an amendment to the constitution that says 'the right of the people to keep and bear Arms, shall not be infringed.' As long as we follow that, guns won't be whites only.
You say most people would support a tyrant, which may not be true but let's go with that. Given that, why wouldn't you want the opposition to that tyrrany to have guns? Your take seems defeatist. You want to just try to live peacefully as tyranny spreads?