A rotary switch and a fascia gun. The rotary switch comprises: an electrical component unit; a switch support, the switch support being ring-shaped, and the inner ring of the switch support being sleeved on the electrical component unit; and a rotating portion, the rotating portion being ring-shaped, the inner ring of the rotating portion being sleeved on the outer ring of the switch support, and the rotating portion being configured to rotate and drive the switch support to rotate, so as to drive the electrical component unit to rotate.
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