Seems rather toothless...and would appear to only apply to city owned/leased real property. Not sure where you get the musket/pre-1898 part tho...those are still firearms under city code referenced.
Note that 15-18 was repealed entirely in 2004.Sec. 15-14. - Possession of dangerous weapons.
For the purposes of this section, the term "dangerous weapon" shall be defined as any object or device designed or intended to be used to inflict serious injury upon persons or property, including, but not limited to, firearms; knives of any kind or type having a blade in excess of 3½ inches in length, except when used solely for preparation of food, instruction or maintenance; razors and razor blades, except when used solely for personal shaving; metallic knuckles; clubs, blackjacks and nightsticks; dynamite cartridges, bombs, grenades, mines and other powerful explosives; slingshots; shurikins; stun guns; and loaded canes.
It shall be unlawful for any person to carry, possess or have within his immediate access any dangerous weapon while in or upon any real property owned (except property owned by the city and leased to some other person or organization), leased, as lessee, or otherwise temporarily controlled by the city, whether such property is located within or outside the corporate city limits.
This section shall not apply to the following persons while acting lawfully and within the scope of their duties and authority:
Law enforcement officers.
Officers and soldiers of the armed forces, militia and national guard.
Any person who carries a dangerous weapon onto the premises of Charlotte/Douglas International Airport for the sole purpose of shipping the weapon by air in compliance with federal and state laws and regulations.
Persons specifically authorized by state or federal law to carry firearms in the performance of their jobs.
Any other person authorized, in writing, by the city manager or his designee to carry or possess dangerous weapons while in or upon specified public property. The city manager may promulgate guidelines for the issuance of permits for the possession of dangerous weapons on public property. The purpose of the guidelines shall be to ensure that permits are issued only for lawful purposes and in circumstances which present no threat to the safety and welfare of any person.
This section shall not prohibit the lawful possession or carrying of dangerous weapons on the public streets and sidewalks, except as provided in section 15-18.
(Code 1985, § 15-23)