No, you don't. It takes 2/3 in the house, 2/3 in the Senate and 3/4 of the state legislatures.
Yes, it is hard.
There are many facets to government that aren't specifically mentioned in the Constitution. They aren't implemented as a design to get around the Constitution. And if there is a dispute, the courts sort it out. The courts make their share of mistakes, and we either live with it, of try to rectify it.
There is no end in the arc of politics. The problems will never be solved to everyone's satisfaction.
So, we agree its meant to be hard? I forgot the state legislature part.
You are 100% correct. WE, via our legislators enact rules(laws). Those laws are subject to court review.
Our system is not set up for the end run of unelected three letter agencies to be used to bring restrictions that one side or tge other cannot get passed via legislation.
Be that the FBI, ATF, NIH, EPA, etc.
If there were votes for an "assault weapon" ban, it would already be in place. What is happening now is a lot of fundraising and paychecks.
That doesn't even take into account the Clinton ban didn't achieve its desired results.
Handguns account for most gun related deaths, and a huge swath of those deaths are suicide, not violence.