If this goes door to door with "no knock" warrants in the middle of the night, someone is going to get killed. If it turns out to be a cop, this will get far greater nationwide media attention than it is now. If they kill a citizen, all bets are off. Cameras will be everywhere watching these freedom robbers every move. I think we've reached a crossroads here. The police and legislators have really painted themselves into a corner. I can all but guarantee you they wished they hadn't done this. The burden to end it is all on them, along with how it's going to end.
The worst thing they can do will be to offer some type of "amnesty", and push back the registration date. That will do nothing but gather even more resistance. The bulk of these people could have complied, but chose not to. More time is going to do nothing except make them even more defiant.
There maybe some advantage to extending the confrontation.
One is that folks have taken a stand...went right to the brink and are willing to go all the way over for their right. That takes a lot of courage and fortitude. If the government pushes the brink farther out, they will need to find that courage and fortitude again. Most might, I hope, but some will not and the ranks of the resistance will be lessened.
Another social pressure. Smear campaigns listing the names and addresses of violators, rewards for turning in violators, even though they are likely to be known already, it will rally support for the law and create more pressure to comply. Billboards and ads on public transportation vilifying resistors (the usual stuff) could be increased.
Also, it will give the government time to apply non-confrontational means to encourage compliance. For instance, withholding any financial assistance to anyone not in compliance. VA benefits perhaps, any state income tax deductions might go away for resistors. Home and Life insurance rates for them might be raised by law. Zoning penalties for having unregistered weapons might be applied.
Refusal to comply with any of those actions could lead to confrontation like not paying additional taxes imposed, but some will not...like withholding any paid benefits and increases in insurance costs...you don't comply or pay up, you do without the benefit...no one shows up at your door.
I expect that postponing the confrontation will tend to reduce the ranks of the stalwart by making it a growing PITA to hold out for the final reckoning.