https://youtu.be/-_VVVTmiWFo
390 million guns in "free"?? America.
No invading army would be stupid enough to do that. Rather, they will wait, for you to cower to your own government and give up your guns willingly, or have them taken after you've been arrested. THEN the invading army will walk in and take it. Nary a shot fired at them.
This is a way more likely play out than what you're suggesting.
And spare me the bullshit about how you'll stand up and fight. If you wanted me to believe that, you'd be doing it and I could see it in the news. I still haven't seen any report of how complicit legislators in any state or federal body have been recalled, save Gavin. You guys won't even do the minimum basic level of fighting, much less ever get out a rifle.