The MKb42 (H) made by Haenel was the first Semi/Fully Automatic rifle using the short intermediate cartridge. Of particular note is the much longer gas tube and the fact it was an Open Bolt firing gun.
As the War progressed, development of the rifle and its' design changed until it ended as the MP44 then renamed StG44.
The photos MadMike posted do indeed show how realistic Shoei's replicas are.
Hobby collector of Replica model guns and Militaria.
also member of Living History Reenactment Groups.