It has to be done at a FFL before you take possession, so even a P80 has to be engraved before you touch it.
That was my understanding of the law. I remember Wgs had a p80 lower and I asked "i thought those were illegal " they said it would be serialized before the buyer took ownership.
That why this bill seems so stupid. They're literally admitting to letting "criminals" walk. They're catching people with things that are by their definition is illegal and then letting them free. Just because the firearm is in pieces. Yet it's illegal just to own or have in possession?
It's like seeing a person with a stockpile of fireworks and saying that's fine to have it just as long as they're not caught lighting them...