The MP 3008 was a last ditch weapon made by Germany in 1945. Also known as the Volksmaschinenpistole (peoples’ machinepistol), this 9x19mm gun was a copy of the British Mk. 2 Sten with a few minor alterations, the most noticeable being the magazine being rotated to the bottom of the gun compared to the Sten’s side magazine.
About 10,000 of these simple guns were built to arm the last ditch German defenses in WW2.
The crazy thing is it wasn’t just Berlin. There were several factories making guns while their city was actively being attacked, in multiple countries in that one war.
Here’s Ian’s video on the PPS-42 made in actively besieged Leningrad.
https://youtu.be/VbTNE0NVUMw?si=