Bazooka disguised as a broom. The weapon can not only fire a bazooka shell but sweeps up the mess afterwards.
Intended to be used by Maxwell Smart when posing as a building maintenance service man. Unfortunately, however, Max inadvertently takes a real broom from the CONTROL weapons lab, leaving Doc Simon at the lab sweeping up with a bazooka.
[Mentioned, Episode #123: "Age Before Duty".]