Re: "no requirement of 'registration' for deactivated firearms"
hmmm.. Google shed80 (not from home obviously)
I must say reading this thread at a time I had stupidly turned JS for google on in a 'private browser' window, I now get "how to cast the perfect gun barrel" coming up in my suggestions. I do often watch engineering videos on a tablet shortly before going to sleep and that sometimes involves casting, but in the couple of years I've been doing that I've not before had such videos suggested (nor any for other weapons parts).
Was very tempted but given the current NZ climate of excess fear, decided not to bother (leastways not till I can be bothered firing up a torrified lappy from somewhere NOT too nearby... :) )