We Never Know
No Slack
Sure - the gun is an inanimate object. But one thing that sets mass shooters apart from the general public that they acquire caches of weapons suited to mass shootings.
Good.
The intended use of beer isn't drunk driving. The intended use of many firearms is the taking of human life. So that's one difference.
That being said, if a brewer or a firearms manufacturer are designing or marketing their products in a way that causes significant harm to third parties, then why shouldn't they be held liable?
If you mean rifled firearms, the answer is hunting. If you mean pistol, it was for self-defense.
Any gun will only kills humans if..
1. Its misused(mass shootings)
2. Used in self-defense(self describing)
3. The one holding it uses it for such(its the person holding it, not the gun