Stunner

Michael with a stunner in hand, just before collapsing from atmospheric deficiencies ^{(TOS: "Greetings From Earth")}

A stunner is a Terran electronic device capable of temporarily incapacitating a person.

Michael uses one against Reese aboard Galactica's landing bay after exiting Lunar Avion, discovering that the ship had been intercepted ^{(TOS: "Greetings From Earth")}.

Notes

The prop is a modified hand-held pocket flashlight.