Aside from this lawsuit being illegal on the federal level, it's dumb.
They're suing Glock over a product that they don't even produce, and is already illegal.
These switches are basically modifications that only street punks with small penises have interest in. They basically modify a handgun to fire 20 rounds per second.
That sounds scary to useful idiots; but, that makes the gun completely impractical.
It seems like the gun control people have never even tried to fire a handgun. It's not easy. It takes training to even be able to consistently hit a chest-sized target from ten feet away with a semi-auto or a revolver. A full auto Glock might net a thug one body. A semi-auto Glock will do the same. Characterization of these modified Glocks as, "weapons of mass destruction" as the city of Chicago has, is a lie.
This is stupider than Trump's bump stock ban.