(often abbreviated p.m.d., literally: Machine pistol, diversionary) is a name applied to a Polish prototype compact submachine gun or machine pistol design.
As the name suggests, the weapon was intended as a light-weight, small and reliable firearm intended as a primary weapon of sabotage squads.
[1] The basic requirements for such a weapon were drawn by February 1939, the prototype was to be completed by November of that year by the Instytut Techniczny Uzbrojenia institute.
[1] However, the outbreak of World War II prevented the completion of the prototype and it never left the drawing boards.
[1] Because of that, it never received official military designation and is referred to in literature by its descriptive name rather than a proper name.