Thread: Firearm Registry Data Questions and Answers

I've read over the whole thread, and the info on the website about registering, and the events that will start the clock on registering. But what i am unclear on is buying a suppressor. It is not listed as a 'major part' as far as I can see/understand, however, it looks as if it is open to interpretation (real helpful).
Would you consider a suppressor to be a 'major part' or something that would start the registering process?