This chapter shall not apply to any of the following:
A. Any peace officer as defined in § 830 of the California Penal Code, persons authorized by § 12031(b) of the California Penal Code or Federal officers authorized to carry firearms in the discharge of their duties;
B. Any toy which will not expel an object therefrom;
C. Starter and timing guns used at lawfully constituted sporting events;
D. Devices or guns used to drive staples, rivets, plate fasteners or for other purposes in connection with building or other construction maintenance or repairs or for any other use specifically authorized by any law;
E. Any structure or facility which is used for test firing of firearms in connection with the business of gunsmithing, as approved by the Chief of Police who shall have the right to inspect the facility at any reasonable time. (Ord. 2052 (part), 1975; Ord. 1881 § 2 (part), 1973).