https://www.americanrifleman.org/conten ... orm-rifle/

The military firearms produced for the government of the Third Reich are generally recognized as being some of the finest of World War II. On the one hand, that is certainly true when you consider German innovations like the general-purpose machine gun, the intermediate cartridge, and the roller-delayed blowback operating system. But when the demand for resources began to outpace the available supply, Germany eventually had to cut corners like everybody else.

The ongoing development of small arms over the course of the conflict therefore became a process of not just building better guns, but also building them as economically as possible. By late 1944, the Third Reich had to confront certain emerging realities about manpower as well. After staggering battlefield setbacks in North Africa and the Soviet Union in 1943, and the retreat on all fronts that began during the summer of 1944, the time had come to mobilize the element of Germany’s male population that was not already in uniform.

Wow, interesting -- I've never seen that before.

The slo-mo portion of the video was pretty cool. Before the slo-mo started I kept thinking to myself, "I swear that thing is moving...". Sure enough.

Good find!
Here’s more:
https://www.google.com/amp/s/militaryhi ... urm-2/amp/

Sheet metal with a reciprocating sleeve around the barrel.

Looks like someone could build that in a garage.

Yep. That was the whole purpose of those weapons: cheap mass production of disposable guns for disposable warriors.

Cool, but an odd caliber.

PPU still makes it though. Gotta keep all those repro MP-43s fed!

Amazed what PPU produces sometimes

never heard of that one either, very cool.