Except as hereinafter provided, no person shall discharge a firearm of any kind, bow and arrow, air gun, BB gun, sling shot or any similar device for the propulsion of shots or metal pellets by means of compressed air, gas or mechanical spring action within the city; except by a sworn peace officer who does so as a part of official duty.
(`89 Code, § 171.010(7)) Penalty, see § 10.99