this title, the gun dealer shall deliver a gun or ammunition the dealer receives under the gun buyback program to the State or unit of local government from which it receives the subgrant not later than 60 days after receiving such gun. (c) Ammunition collection A State, unit of local government, or gun dealer conducting a gun buyback program under this title may accept ammunition from individuals wishing to dispose of it, which shall be recycled in accordance with paragraph (3), but may not use smart prepaid cards to purchase ammunition under the gun buyback program. (d) Incentives for gun dealer participation To the extent that the Director determines necessary to facilitate participation of gun dealers in the gun buyback program, grant funds may be used to provide monetary or other incentives to gun dealers to participate in such program. For purposes of subsection (a), any such incentives shall be treated as part of the subgrant to the gun dealer described in paragraph (1)(B) thereof. (e) Resale of guns prohibited A State, unit of local government, or gun dealer conducting a gun buyback program under this title may not sell a gun or ammunition received under such program. (f) Criminal database check A State, unit of local government, or office of the Bureau of Alcohol, Tobacco, Firearms and Explosives that receives a gun under a gun buyback program under this title shall, not later than 21 days after receiving the gun, use any database accessible to the State, unit of local government, or office of the Bureau of Alcohol, Tobacco, Firearms and Explosives, as applicable, in order to determine whether the gun was used in the commission of a crime. If such a gun was used in the commission of a crime, the gun shall be delivered to the appropriate prosecuting authority. 106. Definitions In this title: (1) Ammunition The term ammunition has the meaning given such term in section 921(a)(17)(A) of title 18, United States Code. (2) Gun The term gun means firearm as defined in section 921(a)(3) of title 18, United