First, I’d like to highlight that I understand that, legally speaking, arms manufacturers are not typically accountable for the way their products are used. My question is not “why aren’t they accountable?” but “why SHOULDN’T they be accountable?”

Also important to note that I am asking from an American perspective. Local and national gun violence is something I am constantly exposed to as an American citizen, and the lack of legislation on this violence is something I’ve always been confused by. That is, I’ve always been confused why all effort, energy, and resources seem to go into pursuing those who have used firearms to end human lives that are under the protection of the government, rather than the prevention of the use of firearms to end human lives.

All this leads to my question. If a company designs, manufactures, and distributes implements that primarily exist to end human life, why shouldn’t they be at least partially blamed for the human lives that are ended with those implements?

I can see a basic argument right away: If I purchase a vehicle, an implement designed and advertised to be used for transportation, and use it as a weapon to end human lives, it’d be absurd for the manufacturer to be held legally accountable for my improper use of their implement. However, I can’t quite extend that logic to firearms. Guns were made, by design, to be effective and efficient at the ending of human lives. Using the firearms in the way they were designed to be used is the primary difference for me. If we determine that the extra-judicial ending of human life is a crime of great magnitude, shouldn’t those who facilitate these crimes be held accountable?

TL;DR: To reiterate and rephrase my question, why should those who intentionally make and sell guns for the implied purpose of killing people not be held accountable when those guns are then used to do exactly what they were designed to do?