I know this is probably not the right place to ask this, but i figured this is as good as place as any to start. I'm thinking of going through the paperword and BATF and such to be able to buy a suppressor for my handgun. I want to get as many things done as possible before needing to go through the paperwork. My question is, is it illegal or legal for me buy a threaded barrel and have it prior to doing any paperwork? I heard people say legal, and i have heard people say it's illegal, so i'm looking to this site here to give me some insight on the subject. Thank you to anyone who responds.