Many States are the call in point for the NICS check as opposed to the FBI NICS Center.
The State agency takes the info from the dealer,,does the NICS check call itself PLUS runs the info through what ever other data resource bases they want to.
They are checking more for local information that may have not (yet) made it's way to the Fed system.
I've been told by another FFL that Tennessee does it that way ... and also runs the firearms serial number for stolen in NCIC.
A NICS check does not run the firearms serial number,,they do not ask for the firearms serial number though it is on the 4473.
Awfully nice rifle BTW..!