Martin, could you stop messing follish Friedrich up?!

[img]tongue.gif[/img] The 'Johnny' Johnson I know is John Edgar Johnson, wing commander, 38 victories, still alive. Right?
And the answer would be:
Hugo Schmeißer, popular hand-guns designer didn't participate in the Maschinepistol 1938's designs. He was only the director of the factory Haenel von Schul, where the weapon was produced during the war.
The real father of the 'Schmeißer' was Berthold Geiper, director of Erfurter Maschinenfabrik Werke, who since the early 1930s experimented and tested many sub-machine-guns that would lead to the creation of the incredible MP-38 and its later versions.