Abstract: An air handling system for handling air and contaminants within an indoor gun range is provided. The air handling system includes a conditioning unit coupled to the indoor gun range. An air supply assembly is coupled in flow communication to the conditioning unit and the indoor gun range, wherein the air supply assembly is configured to discharge air from the conditioning unit and into the indoor gun range. The air handling system includes an air recirculation assembly coupled in flow communication to the air supply assembly and the indoor gun range. The air recirculation assembly is configured to recirculate at least one of a first amount of discharged air and a second amount of discharged air to the air supply assembly. An air exhaust assembly is coupled in flow communication to the indoor gun range.