If the gun was legal to sell, and if the person to whom the manufacturer sold to gun to sell to consumers was licensed by the state to do so, I don't really see an argument for why that manufacturer should even have to go to court. If you sell a legal ware according to legal strictures, and it works as advertised and does not malfunction and harm consumers, why should it be an option for you to be "held accountable"? The whole thing largely seems to me to be a backdoor way for people who don't think the gun should have been legal in the first place to get "justice" against the manufacturers, and while I understand the emotional and moral impetus for that, I also can't say that I think it's legally or ethically justified.