How do you respond to, "Guns don't kill people"?

Y'know the argument, "Guns are just tools. Guns don't kill people, people kill people."

I've gotten into many "debates" with people and they always end up firmly sitting on this one point and disregard any evidence I may provide.

How should I go about countering/unpacking this? I know it's a bad-faith argument with a fallacy but I can't put my finger on it...