Can We Support Laws That Prevent Mass Tragedies Like This?

The buffalo shooter and the valdi shooter were both 18 years oldnd i don't exactly know the buffalo shooter's situation. In most high school shootings, columbine, sandy hook, this latest one, if not in all of them, the person that does these shootings is almost always 18, 19 something years old. So then can we support laws that, one, actually prevent mass tragedy, shooting like this, even just some? And two, won't fundamentally transgress the right for responsible adults to bear arms,. maybe it's nice that we have a few ourselves?"