I think it is obvious that the second amendment, written and approved by states that had just finished using guns to overthrow a government they saw as tyrannical, was written to ensure that each state would have a militia and that each individual would be armed against a potential future tyrannical government right here in the USA.
Because I think that is obvious, I am not going to bother arguing for it.
Today, though, I was reading about governments in Romans 13. Here are the pertinent passages:
Every person is to be subject to the governing authorities. For there is no authority except from God, and those which exist are established by God. Therefore whoever resists autohrity has opposed the ordinance of God, and they who have opposed will receive condemnation upon themselves.
In light of Amendment 2 and Romans 13:2, I say to citizens of America that you have the constitutionally protected right to bear arms that are powerful enough to protect you from the American government (good luck with that). I say to the citizens of heaven that overthrowing earthly governments—and most likely using any gun for anything but hunting—is forbidden by the Kingdom for which you are an ambassador.