“(a) ‘Armed with a dangerous weapon’. A person is considered armed with a dangerous weapon for purposes of this Article when he or she carries on or about his or her person or is otherwise armed wit a category I, or category II weapon. (b) A category I weapon is a pistol, revolver, rifle, shotgun, spring gun, or any other firearm, sawed-off shotgun, a stun gun or taser as defined in paragraph (a) of Section 24-1 of this Code, knife with a blade of at least 3 inches in length, dagger, dirk, switchblade knife, stiletto, or any other deadly or dangerous weapon or instrument of like character. (c) A category II weapon is a bludgeon, blackjack, slungshot, sand-bag sandclub, metal knuckles, billy or other dangerous weapon of like character. (Emphasis added.)(720 ILCS 5/33A-1 (West 1994)).
http://caselaw.lp.findlaw.com/scripts/getcase.pl?court=il&vol=app/2001/3990309&invol=3