A firearm is generally a rifle, pistol, shotgun, or other portable weapon that expels a projectile (bullet) by use of an explosive action. The definition of a firearm may vary from state to state under state statutes—and under federal statutes—and related items such as a muffler or silencer may be included in the definition of a firearm for purposes of certain criminal offenses (crimes).
In Arizona, firearms are defined under state law in a manner consistent with the general description provided: a rifle, pistol, shotgun, or other portable weapon that expels a projectile by the action of an explosive. Arizona Revised Statutes (ARS) § 13-3101 provides the legal definitions related to firearms. The state has relatively permissive gun laws and does not require permits to purchase or carry firearms, whether openly or concealed. Additionally, items such as mufflers or silencers are regulated under federal law by the National Firearms Act (NFA) and are legal in Arizona as long as they are registered in accordance with federal regulations. It is important to note that while Arizona state law may be less restrictive, federal law still applies within the state, and individuals must comply with all applicable federal regulations regarding firearms and related accessories.