Registration of all handguns.

[NutmegYankee]

13. One thing to keep in mind is that gun owners fear paying expensive fees each year with registration

Proposals for registration in Connecticut and Rhode Island would require a separate form and fee for each gun they own, and would require each registration certificate be renewed annually for yet another fee. Rhode Island proposed a $100 per weapon fee to be paid annually. Many owners can't afford that kind of money. In my case, I'd pay hundreds of dollars and I've only purchased one gun in my life. The others were passed onto me by my father and grandfather, and are older than I am.

If it was just as simple as asking what serial numbers do you own and filing that with police, I'd likely not have much issue with it. It would make getting any stolen firearms back far better a chance.
But there is a real concern that the registration system would be used as a "cash cow" to bankrupt people or that a simple bureaucratic delay or a mistake in processing could result in you losing your possessions. Those are real concerns of far more than 1%.