Or that's what S.C. Code § 16-23-430 suggests:

It shall be [a felony] for any person, except State, county or municipal law-enforcement officers or personnel authorized by school officials, to carry on his person, while on any elementary or secondary school property, a knife, with a blade over two inches long, a blackjack, a metal pipe or pole, firearms or any other type of weapon, device or object which may be used to inflict bodily injury or death.

Not is especially likely to inflict death, not has a substantial chance of inflicting serious or great bodily injury (terms that are indeed used in other statutes), not is usually used to inflict injury, but "may be used to inflict bodily injury." I say it again, yow.