In the development program that would ultimately yield the StG44, the two initial designs were produced by Haenel – the MKb42(H) and Walther – the MKb42(W). The Haenel weapon was preferred, and production of the MKb42(W) ended by early 1943, with only 200 units made.
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[...] Weapons: The MKB-42(w) MKb42(W) | Forgotten Weapons Interesting link with disassembly views of the Walther response to the MKB-42 program. This is [...]
I remember that weapon. The MP44 was the updated version of that.