Very rare 9mm Walther

[Darth 44]

Greetings all

I seek info about rare and obscure WW1 guns.
In this case I`d like to ask you about Walther Modell 6.This is IMO the least known of all Walther pistols.It`s also the first Walther chambered for the 9mmX19 Parabellum cartridge.
The Modell 6 was produced in years 1915-1917
for the always handguns-hungry German army.
As to construction,it`s a single action semi-auto pistol with concealed hammer,frame mounted safety and 8-round magazine released by a heel type catch Simply put,the Modell 6 is a Modell 4(.32 ACP)on steroids. Compared to the Luger it is pretty simple gun IMO and I often wonder why didn`t it find more use,especially that the Modell 6 was produced in wartime,good time for simple and quick to make weapons.
Was there something wrong with the design?
Granted,there`s not many 9mm blowbacks but OTOH I`ve never heard about ASTRA 600s,VKT 44s or COLT Pocket Nine falling apart.Anyway,can you tell me how did the Modell 6 cope with WW1 battlefield conditions and what was general users` opinion of it?

Regards