Made for Talvisota - WInter War, a Rising Storm 2: Vietnam mod.
PPD 34-38, one of the most early mass-produced Russian sub-machine gun. It was a reply to the Suomi KP/31, A Finnish-made submachinegun.
Model is Specular - Glossiness. But if you need Metalness - Roughness please leave a message, I will upload another one for you.