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Continue to ChatGuarder TM G-Series G17/G18c Recoil Spring (150%) https://blackblitzairsoft.com/products/guarder-tm-g-series-g17-g18c-recoil-spring-150
Guarder TM G-Series G17/G18c Recoil Spring (150%) https://blackblitzairsoft.com/products/guarder-tm-g-series-g17-g18c-recoil-spring-150