[Sacajaweau]

ex post facto....already decided that it is unconstitutional.

You can't make criminals out of existing owners.

[webstersII]

“ex post facto....already decided that it is unconstitutional. “

How is this ex post facto?

It just makes it illegal to own a gun that is not registered. If they find you with a gun that is not registered, you go to jail.

The law is about registration, not ownership.