OP, we all admire your gusto. And we all agree with you that if we had to, for our families and our lives, yes... we would fight.
But I would do so, resigned to the fact that I would surely die.
I was in the Corps a long time ago. Not Viet Nam long ago, but before the ACOG when Marines qualified with irons. And even back then, in the late 80's early 90's, a platoon sized force could absolutely decimate a town or city. Add some artillery or some close air support and if you are not really well dug in, you are shitified.
So if the time ever comes, and I pray that it never does, I do not labor under the delusion that me and my neighbors and going to be victorious against real troops, with our AR's and deer rifles.
The biggest concern the modern military has, is not killing people and blowing shit up, it is not utterly destroying an entire town/ city/ county because they were too aggressive. We could have killed every living thing in Iraq and Afghanistan easily, it is much harder adhering to the rules of engagement and carefully selecting targets.
Everyone always says, "Well the Vietnamese did it". No, they didn't. We lost 60k men in Nam and it is a tragedy, but 3 million Vietnamese died.
And in Nam we didn't have Predator drones, infrared,thermal, night vision or Apaches with laser guided munitions.
But if go time ever comes, the best chance you have is to start digging in, and if they decide to come for you, make your peace with God and do the best you can.