Heh. It’s that sticky problem of “possession” that isn’t going to go or end well, for the state or the Citizens.
Didn’t a New England state try that a year ago, and everyone just ignored it? Or am I thinking of the multi-cap mags?
I think NY or CN (maybe both) required registration, but few actually did it.
I think it was New York for semi-auto registration, and Connecticut for high-capacity mags.
Non-compliance was massive.
Mike Vanderboegh writes about this periodically:
http://sipseystreetirregulars.blogspot.com/