32 CFR 1903.10: Weapons.
(a) Except as provided in paragraph (c) of this section, knowingly possessing or causing to be present a weapon on an Agency installation, or attempting to do so is prohibited.
(b) Knowingly possessing or causing to be present a weapon on an Agency installation, incident to hunting or other lawful purposes is prohibited.
(c) This section does not apply—
(1) Where Title 18 U.S.C. 930 applies;
(2) To any person who has received authorization from the Director of the Center for CIA Security, or from his or her designee to possess, carry, transport, or use a weapon in support of the Agency's mission or for other lawful purposes as determined by the Director of the Center for CIA Security;
(3) To the lawful performance of official duties by an officer, agent, or employee of the United States, a State, or a political subdivision thereof, who is authorized by law to engage in or supervise the prevention, detection, investigation, or prosecution of any violation of law; or
(4) To the possession of a weapon by a Federal official or a member of the Armed Forces if such possession is authorized by law.