What if gun owners who didn't keep their guns locked in gun safes had their bullets replaced with rubber ones, or had mandatory trigger locks installed on their guns?
I dunno, I'm just spitballing here, but cars are heavily regulated, licensed, the whole nine yards, and if we had a tenth of that applied to guns, we could probably do a lot to reduce gun deaths and gun violence across the country.
From my perspective, I welcome ideas like these. Limited access control ideas along the line of this framework is where I think the focus needs to be.
Some discussion also could be reserved for equipment like "bump stocks", that at first glance seems to solely be designed to circumvent existing law (it is highly illegal to modify a semi-automatic into a fully-automatic gun). Again, treating these type of equipment like the extremely highly regulated machine gun class is something even the National Review agrees with. (https://www.nationalreview.com/2017/10/bump-stocks-machine-g...)
Obviously, with drunk driving, no one tends to blame the tool, either, as gun control movements often are doing. It is worth pointing out that automobiles are fairly regulated, though. There is a "street legal" definition for a car, you have to have an operator's license, and there are things you cannot do in a car -- elsewise, your license gets taken away. For better or for worse, America's one of the few places out there with a relatively high minimum age to purchase alcohol -- 21 -- and drunk driving was one of the reasons it ended up this way (https://www.boston.com/culture/health/2014/07/17/why-21-a-lo...).
I personally think it's fine to counter over-emotional focus on the tool (after all, 99% of AR-15 owners are just normal, average folks who don't commit mass shootings or indeed violence of any kind). Ultimately, though, "what they're calling for" is a reduction of gun violence. If "they" don't get a reasonable counter-answer to their concerns (and in my opinion, the NRA is doing a poor job here, themselves often being overly-emotional in response), it's entirely possible the regulations "they" want will result in the end.