Poly Technologies Reproduction AK47 AKS Chinese Gas Piston Black. Precision machined at the Poly Technologies facility in Atlanta GA. Built tough and laser engraved Poly Technologies and on the side. Include this gas piston on your MAK 9 conversions as one of your made in specialized factories parts. Constructed of 416 stainless steel ensures smooth operation long life and easy cleaning. Specifications for Poly Technologies Reproduction AK47 AKS Chinese Gas Piston: Manufacturer: Poly Technologies Color: Black Gun Make: Kalashnikov Gun Model: AK-47 Condition Quality: Excellent Condition Details: Other Package Contents: Poly Technologies Reproduction AK47 AKS Chinese Gas Piston What firearm models does the manufacturer say Poly Technologies Reproduction AK47 AKS Chinese Gas Piston is compatible with? The manufacturer says that Poly Technologies Reproduction AK47 AKS Chinese Gas Piston is compatible with AK-47Poly Technologies 71032: Reproduction AK47 AKS Chinese Gas Piston Black