>>>Sorry no sale. the AK’s basic design was ripped off with German help.<<<
Check out AVS-36, SVT-38 and 40.
All are earlier Soviet designs predating STG. A number were captured by the Germans earlier in a War and were put into service being Germany’s first automatic rifles.
Bits and pieces but the Stg was the first that had all the items I mentioned. Soviet AV’s were recoil operated.