Actually, we should always follow what lobbyists push (aka, BRIBE) congress to do (and in some instance, NOT to do) when searching for legislation to curb an abuse of the common welfare and good.
Regarding mass murders, we know that gun manufacturers (and their bought puppet, the NRA) fought and won the right to NOT be sued for the misuse of their deadly products.
If we wanted to make a substantial dent with mass shootings (almost impossible to eliminate without reversing the Constitution's 2nd amendment) pass a law that gun manufacturers AND gun vendors can be sued when their product is sold WITHOUT a thorough background and psychological clean bill of health.
And if you sell your car to some clown who later drives drunk and kills someone, the victim's family should be able to sue YOU for millions in damages, right???
Except cars are for driving and guns are for killing.
Which means it makes even less sense to sue a gun manufacturer for designing a product that does what it was intended to do.
Try that circular logic shit on someone else. That shit wont fly here.
Nothing circular about it. Manufacturers are liable when their products dont work the way they are supposed to while using them correctly. Like if you are driving a car and it randomly explodes or it doesn't brake because of a design flaw, the manufacturers are liable.
When a product works as it's designed to do and people, through their intentional or negligent acts use the products to cause harm a manufacturer cannot be held liable because the products are working as designed.
Guns that shoot are doing what they were designed to do. They are a tool for self defense and hunting. If someone kills another person using a tool that works correctly they aren't liable. If someone runs another over with a car, it's not the cars design that is the problem, it's the killers negligent/intentional behavior.
Likewise with firearms if the gun shoots properly they are not liable. The killer is.if the gun is designed badly and it explodes or something instead of shooting bullets then yeah there is a design flaw. But you can't sue a manufacturer for product that works as it is intended