This is not the fault of the firearms industry.
This is the fault of inadequate and inconsistent licensing and enforcement, from one jurisdiction to another.
Which again, is the fault of the firearms industry, that fights licensing and enforcement at every turn.
No. They merely throw money at the situation in order to maintain the status quo.
It is important to remember that they did not
invent the status quo.
They merely seek to preserve it in pursuit of profits.
But they do no more than ride piggyback upon Public Opinion which, in the main, favors better licensing and enforcement, but which does
not favor seizure or reduction of rights and entitlements in the process.
The responsibility for the Status Quo falls directly upon We-the-People rather than Gun-Makers.
"...How's this. If you get killed with a gun, the gun maker and gun seller are civilally liable if they didn't take measures to keep that gun out of the wrong hands..."
The trouble with that is that "Today's Sane Rational Gun-Buyer" can become "Tomorrow's Mad-Dog Killer", with zero indication at the time of the Sale that any such thing might unfold in future.
How do you hold either a Gun-Maker or a Gun-Seller accountable for human behavior, post-sale?
How do you go about proving that a Gun-Buyer was unfit to own a gun, if you, as the Gun-Maker or Gun-Seller, have abided by existing law related to such sales, and the Buyer passes muster or inspection at-law?
Also, how does a Gun-Maker interject itself into the Sale Process?
Virtually all guns are sold through Distributorships, just like any other product under the sun, and it is impossible for a Gun-Maker to know who it is being sold to in advance.
It is practical to hold Gun-Sellers to a modicum of Due-Process or Procedure and Standards when conducting any such sale.
But it is entirely impractical in the Real World to hold a Gun-Maker to that same standard.
Understood; however, in the Real World, it won't work for others, in large part, and certainly with respect to Gun-Makers, for reasons already outlined.