Essential part for upgrading your Airsoft AEG Polycarbonate Piston is the lightweight piston with high impact-durability Unlike conventional one, this Piston is super lightweight Suitable for mainstream high-speed tune-up and has excellent operational characteristics Reinforced piston provide extra duration during rapid & prolonged firing Built Material : POM & Steel Suitable for all type gearbox(except PSG-1 and FA-MAS) Weight(Gram):160
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