Rheon carbine

The Sontaran baton was a device of Sontaran design which was carried by certain high ranking officers of the Sontaran Empire. They were symbols of rank and status, as well as multi-function tools.

These long black coloured batons were capable of firing an orange beam that was able to stun or injure a target. Furthermore, they were able to repair minor damage to Sontaran technology such as the Teleport pod.

Group Marshal Stike carried a baton, as did General Staal of the Tenth Sontaran Battle Fleet. (TV: The Two Doctors, The Sontaran Stratagem / The Poison Sky)

Fleet Marshal Stentor carried a Battle Standard instead of a baton. (PROSE: Lords of the Storm)

Behind the scenes
A number of official magazines licenced by the BBC (Doctor Who DVD Files, Doctor Who Monster Invasion and Doctor Who Magazine) refer to this weapon as a "Sontaran swagger stick."