And it still makes so much sense that you still haven't managed to present a good argument against it since the last thread I made it in.
Except that arguments have been made against it.
You can claim that there's no threat of foreign invasion, but it's always a possibility. In addition, it's not just foreign threats that are considered, you have to look at domestic ones. This country wouldn't even exist if not for an armed militia that was tired of being treated the way that the King of England treated them... taxation without representation, etc. So they revolted against the government and founded what would become the greatest and most free nation in the world. The 2nd Amendment covers the defense of tyrannical governments as well. As I've presented in a number of different threads on this subject when you've claimed it to be antiquated.