According to the ATF database, there are 4 registered FFLs in Middleton, Wisconsin.
8612 FAIRWAY PLMIDDLETON, WI, 53562
8601 STONEBROOK CIRCLEMIDDLETON, WI, 53562
4319 TWIN VALLEY RD UNIT 8MIDDLETON, WI, 53562
5322 MATHEWS RD APT 1MIDDLETON, WI, 53562