A “Concealed firearm” is defined, in relevant part, as a loaded or unloaded handgun. “Handgun” means any device which is designed to expel a projectile or projectiles by the action of an explosion, expansion of gas, or escape of gas that is designed to be held and fired by the use of a single hand. “Handgun” does not include: A stun gun or taser; A machine gun as defined in item (i) of paragraph (7) of subsection (a) of Section 24-1 of the Criminal Code of 2012; A short-barreled rifle or shotgun as defined in item (ii) of paragraph (7) of subsection (a) of Section 24-1 of the Criminal Code of 2012 Any pneumatic gun, spring gun, paintball gun, or B-B gun which expels a single globular projectile not exceeding .18 inch in diameter, or which has a maximum muzzle velocity of less than 700 feet per second, or which expels breakable paint balls containing washable marking colors.