Nevada's Supreme Court ruled that a gun company cannot be liable if a person
uses its product for murder.
I think the judge's ruling is the only proper decision. For any
product that can be used as a weapon, society has basically two
choices: permit people to make, sell, buy and own that product, or
forbid it.
If society decides to permit the product, it must not hold the maker
liable for crimes committed using it. To do that would make
production so dangerous that no one would dare produce it; in
practice, production would be indirectly prohibited. This applies not
only to products that are weapons, but also to other products which
are not intended as weapons, but are dangerous -- for instance, table
knives.
It is wrong for society to prohibit _anything_ indirectly via
unpredictable third-party liability. (Can you name something else
that is now being prohibited indirectly in parts of the US?) If
society decides to prohibit making, selling, buying and owning a
certain kind of product, it should do so explicitly and directly, not
by letting others sue the makers into bankruptcy.
I support prohibiting AR-15 rifles, and other guns that can be
converted in effect into machine guns with a convenient add-on. Those
guns make more danger; as far I can see, there is nothing good about
them that could outweigh that reason to prohibit them.