(e) "Firearm" means any weapon which will, is designed to, or may readily be converted to expel a projectile by action of an explosive.

(f) "Pistol" means a loaded or unloaded firearm that is 26 inches or less in length, or a loaded or unloaded firearm that by its construction and appearance conceals itself as a firearm.

(l) "Short-barreled shotgun" means a shotgun having 1 or more barrels less than 18 inches in length or a weapon made from a shotgun, whether by alteration, modification, or otherwise, if the weapon as modified has an overall length of less than 26 inches.

(m) "Shotgun" means a firearm designed or redesigned, made or remade, and intended to be fired from the shoulder and designed or redesigned and made or remade to use the energy of the explosive in a fixed shotgun shell to fire through a smooth bore either a number of ball shot or a single projectile for each single function of the trigger.