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All NBR o-rings for maintenance you will need are in this pack.


Best recommendation use on HAO advance one-piece cylinder with minor tolerance and best air-tight! Compatible with Systema OEM cylinder. Other third-party cylinder don't recommend.

*Please replace all your NBR after 3K BB shots.

Cylinder Sealing Maintenance Pack

SKU: O21
Out of Stock
  • Term Of Use:
    All the products are made and design for Airsoft use. Any modification of structure, exterior, appearance or painting, marking or wiping the cover/instruction on the merchandise may lead to violate your nation's law regulation. Customers shall bear the full legal liability after the modification.


    • Pack of all oring which used in a cylinder
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