By the way, if you want to know who a "prohibited person" is, here you go:
Clarification of prohibited persons
The older Gun Control Act of 1968 prohibits firearms ownership in the U.S. by certain categories of individuals thought to pose a threat to public safety. However, this list differed between the House and the Senate versions of the bill, and led to confusion. The list was later augmented, modified, and clarified in the Firearm Owners Protection Act of 1986. The 1986 list is:
Anyone who has been convicted in any court of a felony punishable by imprisonment for a term exceeding one year, excluding those crimes punishable by imprisonment related to the regulation of business practices, whose full civil rights have not been restored by the State in which the firearms disability was first imposed.[15][16]
Anyone who is a fugitive from justice.
Anyone who is an unlawful user of or addicted to any controlled substances.
Anyone who has been adjudicated as a mental defective or has been involuntarily committed to a mental institution.
Any alien illegally or unlawfully in the United States or an alien admitted to the United States under a nonimmigrant visa. The exception is if the nonimmigrant is in possession of a valid hunting license issued by a US state and/or has been granted a waiver from the Attorney General.
Anyone who has been discharged from the Armed Forces under dishonorable conditions.
Anyone who, having been a citizen of the United States, has renounced his or her citizenship.
Anyone that is subject to a court order that restrains the person from harassing, stalking, or threatening an intimate partner or child of such intimate partner. (Added in 1996, with the Lautenberg Amendment.)
Anyone who has been convicted of a misdemeanor crime of domestic violence. (Added in 1996, with the Lautenberg Amendment)[17]
A person who is under indictment or information for a crime (misdemeanor) punishable by imprisonment for a term exceeding two years cannot lawfully receive a firearm. Such person may continue to lawfully possess firearms obtained prior to the indictment or information, and if cleared or acquitted can receive firearms without restriction.
These provisions are stated in the form of questions on Federal Form 4473.
In 2001, the United States Court of Appeals for the Fifth Circuit (consisting of Texas, Louisiana and Mississippi) ruled that the Lautenberg Amendment, 18 U.S.C. § 922(g)(8)(C)(ii), relating to a firearm ban with respect to persons under a court order in connection with domestic violence, did not violate the Second Amendment and did not violate the Due Process Clause of the Fifth Amendment as applied to the defendant, in United States v. Emerson.[18]