It won't be a dramatic roundup with the SWAT team in attendance. They will just pass a tax on firearms possession.
If you are on record as owning a firearm, then the tax will be assessed. It will start low. If you pay it, you acknowledge owning the firearm. If subsequently you refuse to pay it, then they put a lien on your house, and you won't be able to renew your drivers license until you pay. They will tell your employer to garnish your pay, and tell him why.
Eventually your wife will be fed up and turn them in while you're at work, just before she files for divorce.
Everything you listed has been tried before. The people carrying out the plan were called Tories. They were marked, ostracized, beaten, tarred and feathered, murdered, shot and hanged.
Sons of Liberty, Committees of Safety and vigilance groups took care of the Tories. Tens of thousands of Tories were either physically eliminated or forced to flee the country.
It’s a little known fact that we also had a civil war during our revolution.