Poly Technologies Type 56 Rifle SKS Rear Sight Leaf Spring Black. Specifications for Poly Technologies Type 56 Rifle SKS Rear Sight Leaf Spring: Manufacturer: Poly Technologies Rear Sight Color: Black Gun Make: Kalashnikov Gun Model: SKS Color: Black Gun Type: Rifle Package Contents: Poly Technologies Type 56 Rifle SKS Rear Sight Leaf Spring What firearm models does the manufacturer say Poly Technologies Type 56 Rifle SKS Rear Sight Leaf Spring is compatible with? The manufacturer says that Poly Technologies Type 56 Rifle SKS Rear Sight Leaf Spring is compatible with SKSPoly Technologies 600118: Type 56 Rifle SKS Rear Sight Leaf Spring Black