The form isn’t necessary in private sales!
The form is not required but a private seller would be breaking the law. Too much publicity for anyone that would selling a gun to Governor Perry.
18 U.S. Code § 922 - Unlawful acts
http://www.law.cornell.edu/uscode/text/18/922
(d) It shall be unlawful for any person to sell or otherwise dispose of any firearm or ammunition to any person knowing or having reasonable cause to believe that such person
(1) is under indictment for, or has been convicted in any court of, a crime punishable by imprisonment for a term exceeding one year;