As used in this chapter:
(a) "Deadly weapon" means any instrument, device or thing capable of inflicting death, and designed or specially adapted for use as a weapon, or possessed, carried or used as a weapon.
(b) "Firearm" means any deadly weapon capable of expelling or propelling one or more projectiles by the action of an explosive or combustible propellant. "Firearm" includes an unloaded firearm and any firearm which is inoperable but which can readily be rendered operable.
When determining whether a firearm is capable of expelling or propelling one or more projectiles by the action of an explosive or combustible propellant, the trier of fact may rely upon circumstantial evidence, including, but not limited to, the representations and actions of the individual exercising control over the firearm. (ORC 2923.11)