This is actually a good question. I believe the 2nd is for overt obvious tyranny, but the powers at be know that overt means would never work for them, so they have become masters at subversion and manipulation. Unfortunately, the 2nd Amendment isn't designed to handle subversion, but it prohibits the powers at be from being overt, which is why we haven't been thrown into camps yet. The 2nd is currently doing it's intended job, but these subvert tactics require different tactics from us as well.