Manufacturer liability is the nuclear weapon against ALL industries. What she plans would cripple manufacturing far beyond the firearms industry. Hell, what company - domestic or foreign - would even risk selling their products in our market? Automobiles, appliances, you name it - gone.
Especially with guns.
In all other products the danger is incidental. With guns the danger is inherent, as thats the point of them.
The activists insist that gun manufacturers would be liable for any damage caused with their product. If some gangbanger used a Ruger to shoot another gangbanger Ruger could be sued, as in the Connecticut case recently thrown out, because of the law shielding them from this sort of liability. It is of course impossible to prevent your products being misused twenty years later.
Without that law, everyone in the business would be driven from it both through lawfare and lack of insurance.