The gun manufacturer makes guns. Guns are weapons. They are made to kill. Some are made for hunting animals. Most are made for killing people. There is no negligence here. They know what they are making them for. The gun does just that. That is it's purpose. Guns are made to kill.
You're saying the manufacturers are negligent because the gun falls in the wrong hands and is used to kill illegally. You're also saying the dealers are negligent for selling a gun to the wrong person.
There is a thing called a gun license. It is issued by the state. A person cannot purchase a firearm without this license. Well, that's not true, a person can purchase some guns, and that's the problem. Still, there is a government system (highly flawed, but it's there) that gives people deemed confident a license to own firearms.
Now, based on this, the same argument that you used to remove negligence from the automakers and retailers can be used to remove negligence from the gun manufactures and retailers.
<sub>Will Eisner's last work -
The Plot: The Secret Story of the Protocols of the Elders of ZionRDCW Profile"Well, as it happens, I
wrote the damned SOP," Illescue half snarled, "and as of now, you can bar those jackals from
any part of this facility until Hell's a hockey rink! Is that perfectly clear?!" - Dr. Franz Illescue -
Honor Harrington: At All Costs"I don't know what I'm do, or how I do, I just do." -
Alexander Ovechkin</sub>