The Bloomberg Businessweek article explains why they don’t view this suit as likely to be successful. I’m not a lawyer so I can’t gauge their predictions.
I did, however, note that the article points to the 2005 legislation called the ‘Protection of Lawful Commerce in Arms Act’ which was promoted by the NRA and signed by-President George W. Bush (who would later renounce his NRA membership.) It shields gun manufacturers from liability suits (aka a liability-shield law.) And this is the primary reasons the lawsuit will fail.
The good news? This lawsuit will raise awareness about this super shady law. I don’t think many Americans are aware of its existence. They soon will. Boom.