Every time there is a mass shooting, some ignorant yahoo will suggest that the problem is that victims didn’t have the means to fight back. They argue that the problem in our society isn’t too many high-powered guns in the hands of too many unbalanced thugs, but not enough firearms lying about within reach of teachers and principals and lunch ladies.
There is little doubt that, if we tried that on a wide scale, there would be a time or two when it would work. A good guy with a gun would, indeed, stop a bad guy with a gun.