Gun manufacturers are in most cases politically protected -- a legacy of the w years.
en.wikipedia.org
A friend from back in the old country, Philly, suggested this:
I have a proposal that a number of people have found acceptable AND effective (including big 2nd Amendment supporters). First, passing a firearm safety class prior is required to even begin the buying process. Second, a proficiency check on the weapon being purchased (we've got enough people getting shot, the last thing we need is someone buying guns who can't hit the broadside of a barn!). This must be renewed every two years (or less) - if they can't pass it, TFB, turn in the weapon or face a massive fine/jail time. Third, a minimum 10-14 day waiting period before the sale is finalized. Fourth (and this is the MOST important one), EXTENSIVE, in depth background/mental health checks prior to finalizing the purchase.
BUT - it won't be the Government running these classes/tests/background checks. It will be paid for and the records retained by the manufacturers and distributers. The records cannot be released to anyone EXCEPT their insurance companies and/or courts wherein someone is trying to include the manufacturers/distributers. IF they ran the checks correctly (VERY extensive and thorough), they are insulated against any verdict or judgement against them. HOWEVER, if they didn't run the checks the way they're supposed to, they automatically, by law, are responsible for no less than 50% of any judgement (the other 50% to be assigned based on what the jury decides as for percentages of liability, so it could go up significantly higher than just 50%)
Would this work? You bet your a$$ it would. ONE time where the company/store didn't do what they were supposed to and their insurance policies would be cancelled immediately. No other insurance company would touch them and they'd be out of business in a matter of months. And that ONE time would cause every other company/store to toe the line, dot every i and cross every t, and make DAMN sure every check was done correctly.
Sure, it would add to the cost of each gun (less than you might expect because there would be a volume discount). But if that's what is needed to reduce the number of these kinds of shootings, then that's what needs to be done. And it spreads the cost over ALL gun owners (and NOT the general population) - I've heard many, many times about how most gun owners are responsible, so they should have an issue with sharing the costs.