It seems pretty clear that this is trying to target the production of switch devices that turn firearms fully automatic, to which I would recommend going after the social media companies that allow these devices to be sold openly on their platforms. That's where these devices are coming from. Sure, plenty of them came out of a 3D printer, but most people on the street with them bought them from somebody else, no matter how they were manufactured.

Just enforce existing laws against switches, ghost guns, and automatic firearms, and go after any company that enables or profits from their sale. Regulating 3D printer sales won't solve the issue, because 3D printers are actually somewhat trivial to build, and you don't have to print these things in New York to sell them in New York.