I have no idea how things really work in e.g. Switzerland or Israel, but one can imagine a stylized regime where every healthy adult undergoes military training

I have no idea how things really work in e.g. Switzerland or Israel, but one can imagine a stylized regime where every healthy adult undergoes military training, serves for a period of time, learns to use a rifle which they keep, and all other guns are heavily restricted or outlawed, especially handguns. And the rest of the military can be dispensed with. And then, stringent training can be mandated for drivers too! Just make simulators of the quality used for pilot training and require people to pass difficult tests where they react to unexpected events while driving.