Yep, lets make owning a gun such a registration burden that a lot of regular citizens just give up on it. Gotta disarm the citizen population as much as possible, but it'll take lots of little steps over several decades to do it. Start with one type of ban and add in a bunch of registration hurdles... when that doesn't lower gun deaths, we'll just have to ban more types of guns... when that also doesn't work, we'll just have to ban nearly all guns and start confiscating them.
That's the long-game of the radical left as an unarmed society is easily conquered by a strong centralized government. The US can only be defeated from within and radical leftists getting guns out of the regular citizens hands is one of the most effective tools for that to eventually happen. Lose our right to defend ourselves and our 1st amendment rights go out the door with them.