Guarder SP120 Full Tune-Up Kit for M14 Series Airsoft AEG (TM / Echo1 / CYMA / Matrix Type)

Guarder SP120 Full Tune-Up Kit for M14 Series Airsoft AEG (TM / Echo1 / CYMA / Matrix Type) Full Tune-Up Kit Include:SP120 Spring (Oil Quenched/Tempered Si-Cr Alloy Steel Wire)Polycarbonate PistonAir Seal NozzleBall Bearings Spring GuidePolycarbonate Ventilation Piston HeadStainless Cylinder HeadLucid Chromium Plating CylinderOriginal Type Steel GearEnhanced Tappet6mm Steel BushingShim SetSUPER-LUBE Oil X3Material: S303 Stainless Steel/Brass/Polycarbonate/Aluminum/Acetal/Steel