Guns Modify Bearing Rotor Set for Marui G17/GM Zero Housing Hammer
Constructed with Metal which provide superb hardness and durability for taking impact from the blowback unit.
That will replace the original ones with a more precisely engineered ones that will be much more durable without adding much weight
Suitable For Tokyo Marui G17/GM Series Airsoft Gas Blow Back GBB Pistol Zero Housing Hammer