Ammunition: includes ammunition or cartridge cases, primers, bullets, or propellent powder designed for use in any firearm. 18 USC 921(a)(17)(A).
Antique firearm: any firearm not designed or redesigned for using rim fire or conventional center fire ignition with fixed ammunition and manufactured in or before 1898 (including any matchlock, flintlock, percussion cap, or similar type of ignition system or replica thereof, whether actually manufactured before or after the year 1898) and also any firearm using fixed ammunition manufactured in or before 1898, for which ammunition is no longer manufactured in the United States and is not readily available in the ordinary channels of commercial trade. 26 USC 5845(g).
Armor Piercing Ammunition: (i) a projectile or projectile core which may be used in a handgun and which is constructed entirely from one or a combination of tungsten alloys, steel, iron, brass, bronze, beryllium copper, or depleted uranium; or (ii) a full jacketed projectile larger than .22 caliber designed and intended for use in a handgun and whose jacket has a weight of more than 25 percent of the total weight of the projectile. (C) The term “armor piercing ammunition” does not include shotgun shot required by Federal or State environmental or game regulations for hunting purposes, a frangible projectile designed for target shooting, a projectile which the Attorney General finds is primarily intended to be used for sporting purposes, or any other projectile or projectile core which the Attorney General finds is intended to be used for industrial purposes, including a charge used in an oil and gas well perforating device. 18 USC 921(a)(17)(B).
AOW or ‘Any Other Weapon’: means any weapon or device capable of being concealed on the person from which a shot can be discharged through the energy of an explosive, a pistol or revolver having a barrel with a smooth bore designed or redesigned to fire a fixed shotgun shell, weapons with combination shotgun and rifle barrels 12 inches or more, less than 18 inches in length, from which only a single discharge can be made from either barrel without manual reloading, and shall include any such weapon which may be readily restored to fire. Such term shall not include a pistol or a revolver having a rifled bore, or rifled bores, or weapons designed, made, or intended to be fired from the shoulder and not capable of firing fixed ammunition. 26 USC 5845(e)
Body Armor: any product sold or offered for sale, in interstate or foreign commerce, as personal protective body covering intended to protect against gunfire, regardless of whether the product is to be worn alone or is sold as a complement to another product or garment. 18 USC 921(a)(35)
Concealable firearm: any firearm with a barrel less than sixteen inches in length, measured from the face of the bolt or standing breech. RSMo 571.010(4).
Deadly Weapon: any firearm, loaded or unloaded, or any weapon from which a shot, readily capable of producing death or serious physical injury, may be discharged, or a switchblade knife, dagger, billy club, blackjack or metal knuckles; RSMo 556.061(22)
Destructive Device: any weapon which will expel a projectile by the action of an explosive or other propellant, and which has any barrel with a bore of more than one-half inch in diameter, or bomb, grenade, mine, most rockets and missiles, any explosive, incendiary, or any poison gas. (However, this does not include ‘a shotgun or a shotgun shell which the Attorney General finds is generally recognized as particularly suitable for sporting purposes.’) 26 USC 5845(f)
Firearm: any weapon that is designed or adapted to expel a projectile by the action of an explosive; RSMo 571.010(8)
Firearm: As defined by the ATF: (A) any weapon (including a starter gun) which will or is designed to or may readily be converted to expel a projectile by the action of an explosive; (B) the frame or receiver of any such weapon; (C) any firearm muffler or firearm silencer; or (D) any destructive device. Such term does not include an antique firearm. 18 USC 921(a)(3)
FFL: means a person/business licensed by the ATF as a manufacturer, dealer, or importer of firearms. A Federal Firearms Licensee - a gun store. 28 CFR 25.2.
Fugitive From Justice: any person who has fled from any State to avoid prosecution for a crime or to avoid giving testimony in any criminal proceeding. 18 USC 921(a)(15)
GCA: The Gun Control Act of 1968 was signed into law on October 22, 1968. It focused on regulating interstate commerce in firearms by generally prohibiting interstate firearms transfers except among licensed manufacturers, dealers and importers. 18 USC Ch. 44 Part I
Indictment: an indictment or information in any court under which a crime punishable by imprisonment for a term exceeding one year may be prosecuted. 18 USC 921(a)(14)
Interstate Or Foreign Commerce: includes commerce between any place in a State and any place outside of that State, or within any possession of the United States or the District of Columbia, but such term does not include commerce between places within the same State but through any place outside of that State. 18 USC 921(a)(2)
Intoxicated: substantially impaired mental or physical capacity resulting from introduction of any substance into the body; RSMo 571.010(11).
Knife: any dagger, dirk, stiletto, or bladed hand instrument that is readily capable of inflicting serious physical injury or death by cutting or stabbing a person. For purposes of this chapter, knife does not include any ordinary pocketknife with no blade more than four inches in length; RSMo 571.010(12)
Knuckles: any instrument that consists of finger rings or guards made of a hard substance that is designed or adapted for the purpose of inflicting serious physical injury or death by striking a person with a fist enclosed in the knuckles; RSMo 571.010(13)
Machinegun: any weapon which shoots, is designed to shoot, or can be readily restored to shoot, automatically more than one shot, without manual reloading, by a single function of the trigger. The term shall also include the frame or receiver of any such weapon, any part designed and intended solely and exclusively, or combination of parts designed and intended, for use in converting a weapon into a machinegun, and any combination of parts from which a machinegun can be assembled if such parts are in the possession or under the control of a person. 26 USC 5845(b)
NFA: Enacted in 1934, it imposes a tax on the making and transfer of firearms defined by the Act, as ‘NFA’ firearms. The law also required the registration of all NFA firearms with the Secretary of the Treasury. In 1986, this Act was amended to prohibit the transfer or possession of machineguns. Exceptions were made for machineguns made before the prohibition (May 19, 1986.) These are referred to as ‘pre-ban’ and are transferable.
View Cornell Law NFA Overview
NFA Firearm: A firearm which may be lawfully possessed only after acquiring a permit from the ATF. These include fully automatic firearms (‘machineguns’) short-barreled rifles, short-barreled shotguns, suppressors (‘silencers’), destructive devices, and a random assortment of unusual weapons cleverly referred to as AOWs (Any Other Weapon.) 26 USC 5845(a)
NICS Check: The background check mandated by the Brady Handgun Violence Prevention Act (Brady Act) of 1993, Public Law 103-159. ATF form 4473 is used to perform this background check.
ATF Brady Law Regulations
4473: The form a buyer must complete for the NICS / background check at the time of purchase. Some, not all, of the information on the 4473 is transmitted to the FBI in order to complete the NICS check.
FBI NICS Information
Person: Throughout this document, when I say ‘a person may’ do something, I am referring to a person who is not otherwise prohibited because of past convictions, mental condition, dishonorable discharge, etc.
The ATF definition: The term “person” and the term “whoever” include any individual, corporation, company, association, firm, partnership, society, or joint stock company. 18 USC 921(a)(1).
Prohibited Person: A person is prohibited from possessing a firearm if s/he has been convicted of a crime punishable by a term exceeding one year, is a fugitive from justice, an unlawful user of any controlled substance, has been adjudicated mentally defective, is an illegal alien, has received a dishonorable discharge, renounced their U.S. citizenship, is subject to certain court orders of protection, or has been convicted of any crime of domestic violence. 18 USC 922(g) and (n); and 27 CFR 478.32.
Rifle: a weapon designed or redesigned, made or remade, and intended to be fired from the shoulder and designed or redesigned and made or remade to use the energy of an explosive to fire only a single projectile through a rifled bore for each single pull of the trigger. 18 USC 921(a)(7)
Short-Barreled Rifle: a rifle having one or more barrels less than 16 inches in length and any weapon made from a rifle (whether by alteration, modification, or otherwise) if such weapon, as modified, has an overall length of less than 26 inches. 18 USC 921(a)(8)
School: As used in federal law, the term school means a school which provides elementary or secondary education, as determined under State law. 18 USC 921(a)(27)
School Zone: in, or on the grounds of, a public, parochial or private school; or within a distance of 1,000 feet from the grounds of a public, parochial or private school. 18 USC 921(a)(26)
Shotgun: a weapon designed or redesigned, made or remade, and intended to be fired from the shoulder and designed or redesigned and made or remade to use the energy of an explosive to fire through a smooth bore either a number of ball shot or a single projectile for each single pull of the trigger. 18 USC 921(a)(5)
Short-barreled shotgun: a shotgun having one or more barrels less than eighteen inches in length and any weapon made from a shotgun (whether by alteration, modification or otherwise) if such a weapon as modified has an overall length of less than twenty-six inches. 18 USC 921(a)(6)
Silencer: (also suppressor or “firearm muffler”) any device for silencing, muffling, or diminishing the report of a portable firearm, including any combination of parts, designed or redesigned, and intended for use in assembling or fabricating a firearm silencer or firearm muffler, and any part intended only for use in such assembly or fabrication. 18 USC 921(a)(25).
Switchblade knife: any knife which has a blade that folds or closes into the handle or sheath, and: (a) That opens automatically by pressure applied to a button or other device located on the handle; or (b) That opens or releases from the handle or sheath by the force of gravity or by the application of centrifugal force. RSMo 571.010(21).