I have an 80% lower and as I understand it, once the piece is milled it must be registered and if not registered at at that point, then you might have legal issues. Of course I’d like to learn more about it myself.
Registered?
nothing I own is “registered”, nor is it required to be.
State by State situation.
Any citizen not prohibited from owning a firearm may manufacture as many as he want for his own use and DOES NOT have to register them.
Only in an unfree state!
You see, folks, what the media does? It's got FREEPERS believing they have to register their guns! Good grief!