Poly Technologies Chinese SKS Gas Piston Black. Precision machined at the Poly Technologies facility in Atlanta GA. Built tough and laser engraved ''Poly Technologies and '' on the side. This SKS gas piston from Poly Technologies is a direct replacement for you original piston. Constructed of 416 stainless steel ensures smooth operation long life and easy cleaning. Include this gas piston on your rifle builds as one of your made in specialized factories parts. Specifications for Poly Technologies Chinese SKS Gas Piston: Manufacturer: Poly Technologies Color: Black Gun Make: Kalashnikov Gun Model: SKS Package Contents: Poly Technologies Chinese SKS Gas Piston Poly Technologies 60002: Chinese SKS Gas Piston Black