I have actually loaded and fired a PPSH in Cambodia not more then two months ago, just like in the pic the forward looking "trigger" is a big fat fire selector between semi/auto. IRL its a fat little bit of folded metal which is laterally much broader across then the weapon's trigger. In the screenshot you will also see that this little lever is around half the vertical depth of the trigger guard aswell, which is also consistant with the fire selector of the real weapon 8)