I would add things like required "ballistic fingerprinting", micro-stamping, and cosmetic feature bans on things like collapsible stocks and pistol grips. Also having to go through a background check to purchase ammo, and limits on ammo quantities, having to be licensed to have certain amounts, etc. Those are all things that have been recently tried. It only takes a shift in the political winds for them to come true.
Everyone saying "it won't happen again, we've made too many gains": look how fast those gains were made. Only 15 years ago, concealed carry was rare, ARs were expensive and heavily regulated, magazine capacities were limited, etc. The antis were in control and thought they had everything locked down. And in a few short years, we're where we are now. That's good for us. But it also shows how quickly things can change. We don't know where things will be 15 years from now. I know we all hope the pendulum doesn't swing back the other direction, but if the past decade shows us anything, it's that the pendulum does swing, and it swings quickly. The moment you say "it can't happen", it will.