Governments are jumping on the boogieman of so-called ‘ghost’ guns, which as you all know, are privately made firearms. That isn’t how they are defining it, though. Just like how the anti-gunners redefined “assault weapons” to be a moving target that no one really can define or understand, ghost guns are a made up term that can mean whatever the speaker wants it to mean.
Cities are passing bans against possessing or even looking longingly at ghost guns, which they are defining as any gun without a serial number. This casts a wide net that will capture such things as C&R firearms. Many firearms made before GCA68 became the law of the land do not have, and were not required to have, serial numbers. To engrave a collectable firearm with a serial number would destroy its value, while not engraving that firearm with a serial number makes you a criminal.
Yet passing a law that prohibits privately made firearms will do as much to stop criminals as it did to stop illicit drug dealers. When a person can make a submachine gun for less than $100 of Home Depot parts and some common hand tools, there is little that can be done to stop them. They are making firearms in caves in Pakistan, and in the jungles of the Philippines: