I figured What if Germany worked with the underground more if Adolf was in power, they would have gotten more intel on country's, this is terrifying actually, and that means they would have gotten plans for the USSR's plans for the STV-40's original make in the time frame in the late 1930's, they would have gotten the plans of the never to see service Fusil Automatique Modèle 1917 model, this would be a terrifying rifle to make, knowing German scientist during the 1930s ramp up to war they would have made it more affordable with a steal stamped stock and parts as well as a more simple lever ejection reload as well as adding a recoil spring from the soviet anti tank prototype rifles from the 1930's.
as well as getting the long scope prototype from Americas sniper scope developed in the 1920's.
This version has some ammo it shoots that is prototype Germany had made then stopped because no rifle they had would work because of recoil.