There’s unfortunately no possible way for the government to solve this issue. They can’t go door to door and take people guns. And people won’t willingly give them up because then they are vulnerable to attack. It’s sadly unsolvable. Higher regulations for new purchases would help but thathat doesn’t stop all the existing weapons.
Question on this, how would you expect the millions of people that heat/cool their homes to get by? Or are you advocating for a return to caves ? Unless you’re saying shut those down to build nuclear/solar/wind, which also takes a lot of dirty manufacturing to build. It’s kind of a no-win with this many humans.