IIRC, the gist of it was that you couldn't hold a gun / ammo manufacturer strictly liable for the actions of somebody else. I.e., my neighbor goes crazy and blows away my wife and son before killing himself, I sue the companies that manufactured the gun and ammo he used on a strict liability claim. The way S/L tort claims work is that you don't need to show any kind of intent or negligence on the part of the defendant, just that his actions -- or product -- caused the injury in question. So, in a wrongful death case like the one I just described, you would need only show that the defendants manufactured the gun and ammo used in the killings in order to get a large jury verdict from them, or alternatively coerce a large settlement out of court. That was the kind of crazy stuff that was happening before the passage of this act, and what it was designed to stop from happening.