Pursuant to T.C.A. § 39-17-1361, it is the duty of the sheriff of the county of residence of a person purchasing any firearm, defined by the National Firearms Act, 26 U.S.C. § 5845 et seq., to execute, within 15 business days of any request, all documents required to be submitted by the purchaser if the purchaser is not prohibited from possessing firearms pursuant to T.C.A. § 39-17-1316.