I agree, but the term has also come to refer to guns that have had parts renumbered during a legitimate arsenal overhaul such as an FTR. Finnishcaptured and reworked Soviet
MNs for example. I would argue that category of weapons is not a parts gun or built from scrap parts. I would also argue that the term is sloppy communication with a meaning so diffuse as to be meaningless. What it really means is the potential buyer better look the thing over very closely to find out why the parts have been renumbered.
Fredrick 303 posted while I was typing. I concurr