If / when she assumes the throne she will get whatever she wants. There will be a few democrats that publically oppose her on gun control but privately they know they've got the votes anyway so their public opposition is just for show.
When I see a democrat cast the deciding vote to STOP gun control legislation, after a heated debate, and much arm twisting, I might believe them. You will have some democrats "oppose" gun control but it's just for show and they know it.
I can't think of a single democrat senator that is "pro-gun", and there are probably just a handful of representatives. There are a few anti-gun republican senators like McCain and I'm sure some in the house too.