According to Hirono, AR15's not included in 2a. . . 
Coming from Rep in RI. When I started reading, it smelled like stuff CA tried and had implemented.
There's a broad gap between what a state can get away with, and what the US Congress can do.
Obama lamented he wasn't able to do more on gun control, especially when he had the emotional momentum after Sandy Hook. Since the Dems controlled the House, the Senate and the WH, you have to ponder why he couldn't do what he said.
Now that the Dems again control the House, the Senate and the WH, why have they not already enacted stricter gun control laws? Could it be that the laws they keep wanting to pass are being shot down in state by state as unconstitutional? Or is it that even among the Democrats, they have a large number of 2A supporting voters to worry about having their butts kicked out of office?
Whatever the reason, they seem to rely on emotions and public anger/fear to push these gun control laws through. If the laws could actually do what they claim -- reduce killing and violence -- there would be evidence in the strictest states. Yet, the numbers are the opposite of what they predict will be the case.
The midterms promise to end the Dem majority in the Senate, and maybe the House -- just like the first midterms of Obama's admin. They are going to push what they can while they can, whether it's unconstitutional or not. Same as Obamacare -- unconstitutional as passed, changed after passage to avoid being struck down.