Funny thing Valkay this is not STG-44 but rathe MP43/1 the picture under it though is STG-44 how to know the optic has 3 extended metals connecting it to Gun(Mount system) which indicates it is MP43/1 (They only tested 1 MP43/1 and that’s the picture)while normal STGs with optic had 2 extended metals (They tested 10 STG44s with optics )
The reason it never saw combat was like what valkey said bullets were light and also to add another reason soldiers were losing picture sights after first initial bullets using scope even though STG has light recoil and the fact thst after 30 bullets full mag it would completely lose its zero about scope mount it worked fine other than the German army also concluded that the place they mounted scope was just not stable enough