Arms could be anything from bactria to atomic weapons, and they will never know what will be targeted against them.
That is why the government was forbidden to be involved with this subject in any way. If they abuse their powers, then the people can and will use arms against them.
So here's the (rhetorical) $64K question: what if "the people", or more likely "the sheeple", decide not to react at all? What if 99% of us simply decide it would be easier to meekly comply, and "turn 'em in". What if the sheeple decided we/they could live with prohibitively high taxes on ammo, or microstamping, etc? What would the remaining 1% do? Grab the torches and pitchforks and burn down the chieftain's hut? Or bury 'em and wait for some unforseen line in the sand to be crossed in the future?
Not that I'm looking for an answer here and now, it's just something that we all have to think about and wrestle with on our own. When all's said and done, we're all going to have to decide for ourselves when the camel's back has broken from one too many straws. Dear Lord, please don't let it come to that.
Scouts Out! Cavalry Ho!