The North Carolina General Statutes
14‑269.2. Weapons on campus or other educational property.
(a) The following definitions apply to this section:
(1) Educational property. – Any school building or bus, school campus, grounds, recreational area, athletic field, or other property owned, used, or operated by any board of education or school board of trustees, or directors for the administration of any school.
(1a) Employee. – A person employed by a local board of education or school whether the person is an adult or a minor.
(1b) School. – A public or private school, community college, college, or university.
(2) Student. – A person enrolled in a school or a person who has been suspended or expelled within the last five years from a school, whether the person is an adult or a minor.
(3) Switchblade knife. – A knife containing a blade that opens automatically by the release of a spring or a similar contrivance.
So you cant have one on school grounds.
NCGS says
14‑269.6. Possession and sale of spring‑loaded projectile knives prohibited.
(a) On and after October 1, 1986, it shall be unlawful for any person including law‑enforcement officers of the State, or of any county, city, or town to possess, offer for sale, hold for sale, sell, give, loan, deliver, transport, manufacture or go armed with any spring‑loaded projectile knife, a ballistic knife, or any weapon of similar character. Except that it shall be lawful for a law‑enforcement agency to possess such weapons solely for evidentiary, education or training purposes.
(b) Any person violating the provisions of this section shall be guilty of a Class 1 misdemeanor. (1985 (Reg. Sess., 1986), c. 810, s. 1; 1993, c. 539, s. 167; 1994, Ex. Sess., c. 24, s. 14(c).)
This law is exclusively for the projectile knives that were on the market 20 years ago. It was never intended for switch blades.
Go to the Source.
North Carolina General Statutes Chapter 14
http://ftp.legislature.state.nc.us/enactedlegislation/statutes/html/bychapter/chapter_14.html
It is not currently Illegal in NC to buy or sell these knives.
G.S.14‑269. Carrying concealed weapons
(d) This section does not apply to an ordinary pocket knife carried in a closed position. As used in this section, "ordinary pocket knife" means a small knife, designed for carrying in a pocket or purse, that has its cutting edge and point entirely enclosed by its handle, and that may not be opened by a throwing, explosive, or spring action
So while legal to buy or possess getting cought carrying one can get you a Concealed weapon charge.
Fed law MAY prohibit automatic knives, so don't get picked up by the feds.
NOI