There is no registration of non-assault-weapon long guns.
not yet anyways.
And there won't be anytime soon either.
I can see them stopping private party sales at gun shows.
I can see them requiring ALL transfers of guns to go through an FFL.
I can see an ammo tax or some sort of system that makes sales of ammo over state lines MUCH more difficult.
I could even see another federal AW and large capacity magazine ban.
They won't get the votes for registration though.