549.10 CARRYING VARIOUS WEAPONS PROHIBITED; EXCEPTIONS.

   (a)   No person shall carry a pistol, revolver, bowie knife, dirk, stiletto, dagger or other knife having a blade two and one-half inches in length or longer, or a karate stick or nunchakus, knuckles, a billy, blackjack, or bludgeon, or a knife fitted with a mechanical device for automatic release of the blade opening the knife and locking the blade in the open position and commonly known as a switch or automatic spring knife, or any other dangerous weapon on or about the person without proper justification. "Proper justification" includes, but is not limited to, the right of law enforcement officers and other persons specifically authorized by law to be armed within the scope of his duties. It shall be an affirmative defense to a violation of this section, if it appears that the defendant was at the time engaged in a lawful business, employment or occupation, or that the circumstances in which he was placed justified a prudent man to possess such weapon for the defense of his person, property or family.

   (b)   Whoever violates this section is guilty of a misdemeanor of the fourth degree.