Other / Not Specified, Other Business Fire at gun range controlled by sprinkler system (Las Vegas, NV) October 8, 2012 viking210 The Clark County Fire Department was called to a fire at a gun range late Friday night. Officials said two men were doing maintenance welding work in a gun range inside the building, when air filtering material caught fire. Building sprinklers helped keep the fire in check while firefighters quickly extinguished remaining hot spots.