Libertarianism is bunk because of this. It's not about freedom, it's about your freedom and no one else's.

Libertarians say they are anti regulation, but I ask them if I can murder them to steal their property.

Apparently they are all in favor of that regulation.

Similar to anti gun control people. Ok, I'm your neighbor, can I arm myself with chemical and biological weapons? Or a conventional bomb that will definitely destroy the entire block?

Hm, funny, they are in favor of some gun control.

Neither on of those examples are guns. Also a libertarian wouldn't just accept you murdering them, they would obviously attempt to defend themselves. Your arguments are kind of weak.

The second amendment is the right to keep and bear arms allegedly. You know if you're a well regulated militia.

Anyway everything I listed is arms.

If you want to be literalist as to the actual arms of the second amendment, then nobody should be armed with anything but a breech loading musket.