Why should it be a right that we are bound to as modern citizens? I didn't sign off on the 2nd amendment, it was signed off on 250 years ago by a small group of pre-modern colonial elites. It originally was considered useful because colonists and local militias needed to be able to defend themselves from the British, and to not lose their means to hunt or protect themselves before police.

These days, we have autonomy in our own country, no British will invade us now. What is the purpose of keeping the full right to any gun ownership, if it's not a good thing for the nation? We didn't keep slavery when we realized it was wrong, how bad must it become before we say guns be restricted to use by qualified and safe individuals?

And the idea of "arms" as only guns is silly, there are restrictions on many sorts of weaponry, including guns, so there is not an absolute right for any citizen to have guns at any time already. There are already restrictions and they're neither enforced nor strong enough.