As used in this Article:
BLACKJACK
Any instrument that is designed or adapted for the purpose of stunning or inflicting physical injury by striking a person, and which is readily capable of lethal use;
CONCEALABLE FIREARM
Any firearm with a barrel less than sixteen inches in length, measured from the face of the bolt or standing breech;
DEFACE
To alter or destroy the manufacturer's or importer's serial number or any other distinguishing number or identification mark;
EXPLOSIVE WEAPON
Any explosive, incendiary, or poison gas bomb or similar device designed or adapted for the purpose of inflicting death, serious physical injury, or substantial property damage; or any device designed or adapted for delivering or shooting such a weapon;
FIREARM
Any weapon that is designed or adapted to expel a projectile by the action of an explosive;
FIREARM SILENCER
Any instrument, attachment, or appliance that is designed or adapted to muffle the noise made by the firing of any firearm;
GAS GUN
Any gas ejection device, weapon, cartridge, container or contrivance other than a gas bomb, that is designed or adapted for the purpose of ejecting any poison gas that will cause death or serious physical injury, but not any device that ejects a repellant or temporary incapacitating substance;
INTOXICATED
Substantially impaired mental or physical capacity resulting from introduction of any substance into the body;
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 pocket knife with no blade more than four inches in length;
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;
MACHINE GUN
Any firearm that is capable of firing more than one shot automatically, without manual reloading, by a single function of the trigger;
PROJECTILE WEAPON
Any bow, crossbow, pellet gun, slingshot or other weapon that is not a firearm, which is capable of expelling a projectile that could inflict serious physical injury or death by striking or piercing a person;
RIFLE
Any firearm designed or adapted to be fired from the shoulder and to use the energy of the explosive in a fixed metallic cartridge to fire a projectile through a rifled bore by a single function of the trigger;
SHORT BARREL
A barrel length of less than sixteen inches for a rifle and eighteen inches for a shotgun, both measured from the face of the bolt or standing breech, or an overall rifle or shotgun length of less than twenty-six (26) inches;
SHOTGUN
Any firearm designed or adapted to be fired from the shoulder and to use the energy of the explosive in a fixed shotgun shell to fire a number of shot or a single projectile through a smooth bore barrel by a single function of the trigger;
SPRING GUN
Any fused, timed or nonmanually controlled trap or device designed or adapted to set off an explosion for the purpose of inflicting serious physical injury or death;
SWITCHBLADE KNIFE
Any knife which has a blade that folds or closes into the handle or sheath, and
1. 
That opens automatically by pressure applied to a button or other device located on the handle; or
2. 
That opens or releases from the handle or sheath by the force of gravity or by the application of centrifugal force.
A. 
A person commits an offense if he knowingly possesses, manufactures, transports, repairs, or sells:
1. 
An explosive weapon;
2. 
A machine gun;
3. 
A gas gun;
4. 
A short barreled rifle or shotgun;
5. 
A firearm silencer;
6. 
A switchblade knife;
7. 
A bullet or projectile which explodes or detonates upon impact because of an independent explosive charge after having been shot from a firearm; or
8. 
Knuckles.
B. 
A person does not commit an offense under this Section if his conduct:
1. 
Was incident to the performance of official duty by the armed forces, national guard, a governmental Law Enforcement Agency, or a penal institution; or
2. 
Was incident to engaging in a lawful commercial or business transaction with an organization enumerated in Subdivision (1) of this Section; or
3. 
Was incident to using an explosive weapon in a manner reasonably related to a lawful industrial or commercial enterprise; or
4. 
Was incident to displaying the weapon in a public museum or exhibition; or
5. 
Was incident to dealing with the weapon solely as a curio, ornament, or keepsake, or to using it in a manner reasonably related to a lawful dramatic performance; but if the weapon is a type described in Subdivision (1), (3) or (5) of Subsection (1) of this Section it must be in such a non-functioning condition that it cannot readily be made operable. No short barreled rifle, short barreled shotgun, or machine gun may be possessed, manufactured, transported, repaired or sold as a curio, ornament, or keepsake, unless such person is an importer, manufacturer, dealer, or collector licensed by the Secretary of the Treasury pursuant to the Gun Control Act of 1968, U.S.C., Title 18, or unless such firearm is an "antique firearm" as defined in Subsection (3) of section 571.080, or unless such firearm has been designated a "collectors item" by the Secretary of the Treasury pursuant to the U.S.C., Title 26, Section 5845 (a).
A. 
A person commits the offense of unlawful use of weapons if he knowingly:
1. 
Carries concealed upon or about his person a knife, a firearm, a blackjack or any other weapon readily capable of lethal use; or
2. 
Sets a spring gun; or
3. 
Discharges or shoots a firearm into a dwelling house, a railroad train, boat, aircraft, or motor vehicle as defined in Section 302.010, RSMo, or any building or structure used for the assembling of people; or
4. 
Exhibits, in the presence of one or more persons, any weapon readily capable of lethal use in an angry or threatening manner; or
5. 
Possesses or discharges a firearm or projectile weapon while intoxicated; or
6. 
Discharges a firearm within one hundred yards of any occupied school house, courthouse, or church building; or
7. 
Discharges or shoots a firearm at a mark, at any object, or at random, on, along or across a public highway or discharges or shoots a firearm into any outbuilding; or
8. 
Carries a firearm or any other weapon readily capable of lethal use into any church or place where people have assembled for worship, or into any school, or into any election precinct on any election day, or into any building owned or occupied by any agency of the federal government, State government, or political subdivision thereof, or into any public assemblage of persons met for any lawful purpose.
B. 
Subdivisions (1), (3), (4), (6), (7) and (8) of Subsection (A) of this Section shall not apply to or affect any of the following:
1. 
All State, county and municipal law enforcement officers possessing the duty and power of arrest for violation of the general criminal laws of the State or for violation of ordinances of counties or municipalities of the State, or any person summoned by such officers to assist in making arrests or preserving the peace while actually engaged in assisting such officer;
2. 
Wardens, superintendents and keepers of prisons, penitentiaries, jails and other institutions for the detention of persons accused or convicted of crime;
3. 
Members of the armed forces or national guard while performing their official duty;
4. 
Those persons vested by Article V, Section 1 of the Constitution of Missouri with the judicial power of the State;
5. 
Any person whose bona fide duty is to execute process, civil or criminal.
C. 
Subdivisions (1), (5) and (8) of Subsection (A) of this Section do not apply when the actor is transporting such weapons in a non-functioning State or in an unloaded State when ammunition is not readily accessible or when such weapons are not readily accessible. Subdivision (1) of Subsection (1) of this Section does not apply when the actor is also in possession of an exposed firearm or projectile weapon for the lawful pursuit of game, or is in his dwelling unit or upon business premises over which the actor has possession, authority or control, or is traveling in a continuous journey peaceably through this State.
A person commits the offense of defacing a firearm if he knowingly defaces any firearm.
A person commits the offense of possession of a defaced firearm if he knowingly possesses a firearm which is defaced.
A. 
A person commits the offense of unlawful transfer of weapons if he:
1. 
Knowingly sells, leases, loans, gives away or delivers a firearm or ammunition for a firearm to any person who, under the provisions of Section 571.070, RSMo., is not lawfully entitled to possess such;
2. 
Knowingly sells, leases, loans, gives away or delivers a blackjack to a person less than eighteen years old without the consent of the child's custodial parent or guardian, or recklessly, as defined in Section 562.016, RSMo, sells, leases, loans, gives away or delivers any firearm to a person less than eighteen years old without the consent of the child's custodial parent or guardian; provided, that this does not prohibit the delivery of such weapons to any peace officer or member of the armed forces or national guard while performing his official duty; or
3. 
Recklessly, as defined in Section 562.016, RSMo, sells, leases, loans, gives away or delivers a firearm or ammunition for a firearm to a person who is intoxicated.
[Ord. No. 03-36 §1, 11-18-2003]
A. 
No person who has been issued a concealed carry endorsement by the Missouri Director of Revenue under Sections 571.101 to 571.121, RSMo., or who has been issued a valid permit or endorsement to carry concealed firearms issued by another State or political subdivision of another State, shall, by authority of that endorsement or permit, be allowed to carry a concealed firearm or to openly carry a firearm in any building or portion of a building owned, leased or controlled by the City.
B. 
Signs shall be posted at each entrance of a building entirely owned, leased or controlled by the City stating that carrying of firearms is prohibited. Where the City owns, leases or controls only a portion of a building, signs shall be posted at each entrance to that portion of the building stating that carrying of firearms is prohibited.
C. 
This Section shall not apply to buildings used for public housing by private persons, highways or rest areas, firing ranges or private dwellings owned, leased or controlled by the City unless used for Law Enforcement or correctional purposes.
D. 
Any person violating this Section may be denied entrance to the building or ordered to leave the building. Any City employee violating this Section may be disciplined. No other penalty shall be imposed for a violation of this Section.
E. 
No person who has been issued a certificate of qualification which allows the person to carry a concealed firearm before the Director of Revenue beings issuing concealed carry endorsements in July, 2004, shall, by authority of that certificate, be allowed to carry a concealed firearm or to openly carry a firearm in any building or portion of a building owned, leased or controlled in whole or part by the City.
[1]
State Law Reference — Note that the provisions of L. 2003 H.B. 349, et al, has been codified as §§571.101 through 571.121, RSMo., as amended.