Something similar has already happened with "microstamping", a neigh-mythical technology that would imprint the gun's serial number on all ejected casings. Cali

Something similar has already happened with "microstamping", a neigh-mythical technology that would imprint the gun's serial number on all ejected casings. California has a roster of "safe" handguns which are all that may be sold by dealers in the state. However, they haven't allowed any manufacturer to add a new semiautomatic handgun without microstamping technology, which practically means that there are no new pistols being added to the list. Once the old ones fall off the list, that'll be it - it will be impossible to buy a semiautomatic handgun from a dealer in California.