> People will re-flash their printers with an open-source firmware that won't do the checks?

The text of the bill suggests that it would make printers capable of being reflashed with an open source firmware illegal to sell, as the legal requirements for the blocking would include preventing it from being circumvented. The law would also make having a printer sold mail-order into the state illegal entirely. It’s not clear how parts-built machines like Vorons would be handled.

It appears to only cover sales, however. Possession of files for firearm components would be made illegal, but seemingly not a printer without the restrictions.

There is close to zero chance the current Supreme Court would find a law that criminalizes possession of a file describing the making a gun to be constitutional.

I wonder if you can sell the printer shell without the main PCB and just open source the main board design. Manufacture and sale of that board as a distinct entity seems tough to stop. Especially because the board can have non-3D printer use cases which it advertises as the main ones.