9mm Mauser

The  is a very rare small gun. So rare that only one is obtainable in Fallout, but they are a little more common in Fallout 2.

It uses 9mm Ball in Fallout and 9mm or 9mm Ball in Fallout 2.

Fallout

 * Junktown Casino, found on Gizmo's corpse only.

Fallout 2

 * New Reno Commercial Row, found in a footlocker in the back of New Reno Arms.
 * Willy Special Encounter, found on Willy's guards' corpses.

Behind the scenes
This firearm is the Mauser C96, nicknamed the "Broomhandle". The Mauser pistol was originally manufactured in 7.63mm and a contract of 9mm versions were made for the Imperial German army in the first world war.

Mauser 9mm 9 мм Маузер