Simply put, how about the idea of making guns prohibitively expensive?
My saying guns are nonsense won't change anything, and as a foreigner, I have no right to take away the rights of people in that country. However, as an opinion, I think setting a prohibitively high minimum selling price would be a good idea. They couldn't be sold below that price. For example, $100,000 (13 million yen). For existing gun owners, perhaps a high tax? Because cigarettes in the US are super expensive, right? And the reason they're expensive is the tax, isn't it?
What would happen is that they couldn't be easily purchased. However, the right to obtain them by paying money would remain. It wouldn't infringe on rights.
In short, "Rich people don't commit bank robberies with guns."
If they want a gun, tell them to earn it! If you say that, they might end up earning money without realizing it, and then they might start thinking about things more important than guns, or other things.
Of course, there would be gray areas, illegal activities, and various other exceptions, but to put a brake on the widespread distribution of guns, age restrictions, thorough registration, regulation of gun power, and so on, might be important, but what is undeniable is money, isn't it? (Regarding other factors, there are various issues related to America's unique social background and cultural identity challenges that I've felt through my experiences, but I'll write about those another time.)
That's right, so, "Rich people don't commit bank robberies with guns."
The probability of a rich person owning a gun and killing someone in a domestic dispute (even if they lose all their assets)?
The probability of a rich person going to an elementary school and committing a mass shooting?
America is a country where various things can be done with money, so I wonder if it can't be solved with money...
PS. I don't know how to put it, but seeing the dead children and their parents from that Texas elementary school still truly pains my heart.