Sam, TN is a good RKBA state, not a great one. Our handgun carry laws have loopholes other states don't that causes confusion. But that's a whole 'nother discussion.
The TICS requires the SN so they can tell the dealer if the gun has been reported stolen. As a buyer, it's nice to know the transaction isn't going to come back to bite you sometime.
The TICS requires the SN so they can tell the dealer if the gun has been reported stolen. As a buyer, it's nice to know the transaction isn't going to come back to bite you sometime.