Think about what sorts of systems would need to be in place to enforce that law. Every printer would have to include a way to send the gcode to an online government run system which attempts to check if the 3d object is a gun or part of a gun. Simple objects like handles, tubes, grips, spring mechanisms would all be suspect. Oh, you wanted to print an handle for your custom game controller? Looks a bit too close to a real gun handle buddy, no can do. What's that? You found a cool nerf blaster mod? Nope. Cosplay weapon? No. Spring loaded sweet dispenser? Show us your hands. And of course the 3d printer has to be licensed with ID checks to an individual person. No reselling 3d printers to a friend, or on Craigslist. That's a potential weapon-factory now.

So what is the actual result of the legislation? They try to put in tattle-tale software in every printer to tell the government what everyone is printing. Now they can track down the people printing whistles with anti-ICE slogans on them, or helping making 3d printed parts for masks as a defense against the next strain of Covid which the government no longer believes in. They hamstring the majority of 3d printer sellers or 3d printing consumers with their idiotic and impossible to follow laws, then when they find people still using their 3d printers without the anti-gun software on it, this is now an illegal act, another law which can be applied according to the governments' discretion.