Ubiq,
I am not insisting on “no limits” position, just pointing that tradition of mass ownership is very American and part of the constitution. Heller is 2008, gun ownership was 45% of households in 1973 and declined now to 30%, so Heller did not increase actual ownership at all.
As to specific restriction, unfortunately everything is viewed as partisan, so even you’ll propose “reasonable” measures, the other side will see it as an attack and fight back. You need peshara, where each side gains something while the country moves to a safer/better place. Supposedly, that is what senators are doing (or should be).