I just wanted to check with you all about NFA regulations on this. I've been considering buying for an investment gun a full auto SBR M-4. I want something that will both rise in value, and one that I can take out once in a while and enjoy at the range. Specifically I want a host for a suppressed 5.56 SBR and a 300 Blackout. If and when I purchase this rifle, I assume I'll be paying for both the full auto tax stamp and the SBR tax stamp, correct? And once the transfer comes through, since it's already a registered SBR, I can put whatever upper I want on it and fire away, right?