Prevent Gun Trafficking Act This bill makes gun trafficking a federal crime. Specifically, the bill prohibits (1) knowingly purchasing, acquiring, or attempting to purchase or acquire a firearm from or through a federal firearms licensee for the possession of a third party; or (2) soliciting, hiring, demanding, or ordering another person to purchase, or attempt to purchase, a firearm for the person or transferring the firearm to a third party. Firearms obtained in violation of this prohibition are subject to the forfeiture provisions of the federal criminal code. The prohibition does not apply to a firearm lawfully acquired as a bona fide gift between family members or transferred to an agent of a lawful business for the lawful use in such business. A person who commits a gun trafficking offense is subject to a fine, a prison term of up to 10 years, or both. In addition, the bill prohibits the sale or disposition of a firearm or ammunition to persons who intend to unlawfully sell or dispose of the firearm or ammunition.