It would depend on their patience.
The insurgency in Iraq was eventually suppressed (American COIN manuals were updated). The insurgency (?) in Afghanistan outlasted the patience of the invaders.
So how long do the 'gun nutters' want to keep at it compared to the opposing force?
Further, it's worth asking how effective, on average, is violent disobedience. Generally speaking a movement has about double the odds of success by not using violence:
* https://www.goodreads.com/book/show/44096650-civil-resistanc...
This is the typical comment you expect from reddit.
i doubt we will see this in my lifetime
Guns are not only for counter-insurgency on invasion/warfare. For most people I know who own guns, that's not even on their top 10 list of reasons. But if you don't think they'd be a factor, then you disagree with some of the top generals around the world.