Alvin,
The Hustler is correct in his description of the process. The fingerprinting and CLEO sign-off is the most aggravating part of the whole thing; the ATF waiting game is standard fare when dealing with the Feds....nothing you can do BUT wait.
He's also correct in telling you to check your state and local laws first, to make sure it's even legal to own a SBR...I found out the hard way that Alabama, for instance, allows full auto, but NOT SBR's....go figure!
State by State Chart of NFA Restrictions
Rob