Every gun maker submit to atf the part of the gun that is actually the gun with atf approval. 80% kit is based on glock gen 3 which the frame is the gun. Ghost gun is just a term they used to describe a kit that and easily turn into a gun, depending on your state you got until August to buy all the 80% you want. A person making a gun for self use only is not required to report to anyone. It is legal to make your own firearm since founding of this nation.