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- Suitable for Marui Hi-Capa 5.1 / 4.3 Series Airsoft Gas Blow Black GBB Pistol
- Best use in Conjunction with Metal Slide/Outer Barrel + High Flow Blowoff Valve
- Recoil Spring produces stronger & faster blowback feel
- Hammer Spring increase the hammer tension resulting higher gas output, i.e. more power fps
- As always, upgrading GBB require necessary skill & technique, consult expertise if needed
- Color : Chrome
- Material : Metal
- Item# AIP031


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