The TO&E for the 1991 Red Army shows a squad having a singe RPK-74 (magazine fed) with no assistant gunner.Do they use that or a PKM? I honestly don't know.
There is no machine gun at platoon level. Just the 3 RPKs of the squads.
The company has a machine gun/anti-tank platoon with 3 two man PKM teams, and also 3 two man AT-7 ATGM teams. I suspect the PKMs would have been attached one per platoon when dismounted.
I don't know it that organization still is used.