Think they will go door to door and pick em up?
Ridiculous.
They're not coming for your guns.
At least not in the way people like to think they will.
It's already happened elsewhere, we don't have to guess how it will happen here.
All they have to do is make them illegal and wait. Over time, they'll chip away at the folks who don't turn them in or register their guns. A little at a time, one here, one there, so there's no obvious point at which those who are non-compliant feel like their collective backs are up against the wall and might be spurred to organized resistance.
Someone turns in an enemy, a wife spills the beans during a divorce, someone's kid says the wrong thing at school or at the doctor's office or to a buddy. Somewhere there's a paper trail that turns up a gun that should have been surrendered. Someone has a house fire and the authorities find illegal guns in the ashes. Someone gets careless and gets caught at the range with something he shouldn't own.
They have all the time in the world. Why bother risking lives and resistance by doing a door-to-door? Waiting works just as well if you're not impatient.
They will eventually get them all and with very minor effort.
In the meantime, those non-compliant folks who wouldn't give them up won't be able to rationalize any advantage in keeping their guns. What's the point of having a gun you can't use in self-defense or to hunt, or even to shoot? The only option would be to hide it away and never use it again on penalty of getting caught committing a felony. For all their non-compliance gained them, they might as well have turned them in before the grace period expired and taken the pittance offered.
There's really only one logical "line-in-the-sand" moment, and contrary to popular opinion and oft-repeated slogans, it isn't "when they come for your guns" because that's never going to happen.
