Original Upgrade Kits for WE KATANA Gear Box. Suitable for WE KATANA M4 AEG Series ONLY.
Upgrade Kits included: Piston set (15 tooth) X1 Spring Guide for KATANA Adaptive Cylinder X1 Steel Sector Gear (15 tooth) X1 CNC made Stainless Bushing Set (8mm) X6 Steel Selector Plate X1
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