Too many people have this idea that they will come after the gun owners and risk bloodshed.
IMO, all the State will have to do is issue an Armed and Dangerous warrant for all those gun owners who do not obey the confiscation edict. Then, the next time you and your family are going into town, or on a trip, or even you going to work by yourself, the trooper will run your plate and act accordingly. (Gonn arisk your family in a confrontation?) You're going to be alone when a half dozen cruisers show up as backup - and you are screwed.
Randomly picking us off one by one is a lot simpler.