Hi I'm new and I have tried to find the answer to my questions on this site and anywhere on the internet, to no avail, and I was hoping someone can help me answer my questions. Let me first state that I do NOT have any of the following, but I am only seeking answers prior to making any sort of purchase. I would love to own a Thompson A1 and/or AR-15 with all the options including a suppressor with a grenade launcher, but I would just be happy with a Thompson A1 like my grandpa fought the Korean war with...but my cousin bought it before I had the chance to. If a private party or the opportunity at a gun show presents itself that I can buy what I want at a good price, I want to know my rights and laws. Questions; 1. If I buy a NFA weapon/suppressor/destructive device from anyone in Oregon, other than an FFL Dealer, do I still need to register it and pay the $200 dollar tax fee? 2. If I buy an NFA weapon/suppressor/DD at a gun show does it still need to be registered and pay $200? 3. Am I safe buying in a private sale an NFA listed pre-ban/post-ban fully automatic weapon or DD if it was never registered and after the sale I find out that it was not registered prior to my ownership? How do I register it, if I am required to, if it's never been registered? Does this kind of thing happen or do people register it before buying and pay the fee first? If after I have purchased it can I find myself in legal trouble for buying an unregistered NFA gun? Again, I'm new and I know that my questions may sound dumb. I just want make sure that I am in the clear and legally covered in my private or gun show type purchases. I'm assuming most if not all NFA owners/sellers already know the answers, but I don't, and I'm not expecting full disclosure in a sale to a complete noob. So I feel safe asking here first.