Weapons can have all of the safety features in the world, but the ultimate safety feature will always be the person holding the weapon. If the person in question takes a weapon, loads a round, points it at someone, takes aim, and pulls the trigger none of these measures will matter.
No one talks about suing GM because a distracted driver causes a 10 car pile up. No one wants to sue Ford if they fail to get the oil changed. They can, but they will never find a judge willing to take that case. In these cases, we make the car owner not the company, responsible.
Am I calling for weapons bans? No. If the safety features prevent accidental shootings, good. Limited magaines -- infeffective. Ever see "The Outlaw Josey Wales?" Clint Eastwood's character had multiple revolvers and plenty of firepower. As assault weapons ban? No. CnC milling machines and 3D printers have never been cheaper. If you can buy the steel, you can make the weapon. Heck you can invent your own designs.
Plus banning something for the good of society never works. Alcohol in the 30s and narcotics in the 60s both created enormous criminal empires with the resources of a small country. In the case of narcotics, they have threatened the governments of Columbia and Mexico. Heck diamonds destroyed major parts of Africa and they are legal AND highly regulated. People were enslaved just to mine diamonds so First World people could look pretty and thugs could make war.