These weapons may look very close to AK 74 but actually have a lot more high quality and have been modernised with different variants built later on.
Some variants but not all
RK-62 (The old school version with the "Cheese grater grip")
RK 62-76 (More modified version with a newer rubber front grip)
RK-62M1 (A modernised version of the normal RK 62 with attachable rails and places for bipods, flashlights and sights. Adjustable stock. I used this during my service)
RK-62M2 (Dont know about this much apperantly designed for urban warfare and has the ability to have supressor or a flash hider + previous upgrades on M1)
RK-62M3 (Has a green tint to it. Could not find much about this as its so new, but apperantly had testing with underbarrel grenade launcher but was cancelled + previous upgrades from M1 and M2)
RK-95 TP (a completly new RK with a folding stock, ability to shoot grenades of the barrel and is just overall more accurate and reliable than the 62. Has a place for a sight rail on the left side of the gun)