Quick edit: If this is considered in violation of rule 5, then please delete. I do not wish to bait political arguments and drama.
Edit 2: I would just like to say that I would consider this question answered, or at least as answered as a hypothetical can be. My personal takeaway is that holding weapons manufacturers responsible for gun violence is unrealistic. Regardless of blame and accountability, the guns already exist and will continue to do so. We must carefully consider any and all legislation before we enact it, and especially where firearms are concerned. I hope our politicians and scholars continue working to find compromises that benefit all people. Thank you all for contributing and helping me to better understand the situation of gun violence in America. I truly hope for a better future for the United States and all of humanity. If nothing else, please always treat your fellow man, and your firearm, with the utmost respect. Your fellow man deserves it, and your firearm demands it for the safety of everyone.
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?
Sure if a hunting rifle was used to kill someone then the manufacturer wouldn't be liable. Killing people isn't the primary purpose of that kind of firearm.
But a gun that's primary purpose is to kill people and is marketed as such? Yeah they should be liable for that.
If they are marketing guns for home defense and not making purchaser of the firearm aware that they're statistically more likely to kill themselves or a family member than ever need the gun for a burglar, that seems like negligent behavior to me.
Also if they're marketing anything other than a shotgun for home defense they are creating a dangerous situation unnecessarily. Suggesting someone should fire a weapon which has bullets that can penetrate through the drywall inside a house while the person firing is scared leads to all kinds of foreseeable life threatening scenarios. Shotguns exist, they would be better suited for this (extremely rare) scenario. If they are marketing anything other than a shotgun for home defense they are needlessly putting people's lives in danger.
If people approach this logically (without the standard gun nut wackiness) then yeah there's a lot of negligence going on, possibly gross negligence.
I don't know which kind of shotgun loading you have in mind but sufficiently effective shotgun loadings (read not bird shot) will 100% penetrate dry wall several times before reaching a not fatal velocity. High mass projectiles maintain course better when flying through materials like dry wall.
A cartridge like .223 which relies on velocity, instead of mass, tends to penetrate walls the least. This is because upon it's first impact it begins to destabilize, resulting in a faster loss of velocity.