"After World War II
On April 3, 1945, American troops began to occupy the city of Suhl. Weapons manufacturing was completely prohibited during this time. Hugo Schmeisser and his brother Hans were interrogated for weeks by weapon expert teams of the American and British Secret services. At the end of June 1945, American troops evacuated Suhl and all of Thuringia. One month later, the Red Army assumed control over the area, starting a civilian works project to manufacture weapons for the Soviet Union. By August 1945 the Red Army had created 50 Stg 44s from existing assembly parts, and had begun inspecting their design. 10,785 sheets of technical designs were confiscated by the Soviets as part of their research. In October 1945 Schmeisser was forced to work for the Red Army and instructed to continue development of new weapons."
"By August 1945 the Red Army had created 50 Stg 44s from existing assembly parts"
...could this be some of the ones used by the Volkspolizei units?