http://www.vox.com/2015/10/14/9533389/bernie-sanders-gun-lawsuits-democratic-debate
But the law is more complicated than Clinton suggested. The PLCAA does not provide full legal immunity to the gun industry under some circumstances. And it's unclear if the law single-handedly stopped any successful litigation against gun makers and sellers.
Adam Winkler of the UCLA School of Law said many of these challenges were likely to fail anyway, since "the law generally doesn't hold people liable for other people's criminal behaviors." Still, the PLCAA provides an easy way to get a lawsuit dismissed without paying for expensive court proceedings. "It not only staved off litigation," Winkler said, "but it provided gun dealers with the ability to stave off this litigation without paying lawyers' fees."
But the law didn't immunize gun companies from all legal liability for their products. They can still be held liable if they make or sell a deficient firearm that, for instance, explodes during normal use and injures or kills the user or a bystander. And they can also be held liable for "negligent entrustment" — for example, if a gun shop sells an 8-year-old a gun and the child accidentally shoots someone, the store can be held liable by the shooting victim.
So all it did really was keep the courts from being further burdened by cases that would've gone nowhere anyway.
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