Air Arms HuMa Regulator Service Kits

XTX Air
KIT REG AA

These are replacement O rings for the Air Arms HuMa regulators. Handy for when you want to carry out a basic service of your HuMa regulator.

S400 Series: The set contains:

  • 2 x large main regulator body O rings,
  • 1 x small regulator piston O ring,
  • 1 x large regulator piston O ring,
  • 1 x small set screw adjuster O ring,

S200/CZ 200 - Internal: The set contains:

  • 1 x large main regulator body O ring,
  • 1 x small main regulator body O ring,
  • 1 x stand-off O ring,
  • 1 x small regulator piston O ring,
  • 1 x large regulator piston O ring,
  • 1 x small set screw adjuster O ring,

S200/CZ 200 - External: The set contains:

  • 1 x large main regulator body O ring,
  • 1 x small regulator piston O ring,
  • 1 x large regulator piston O ring,
  • 1 x small set screw adjuster O ring,

FTP900/EV2: The set contains:

  • 1 x large main regulator body O ring,
  • 1 x small main regulator body O ring,
  • 1 x internal body O ring,
  • 1 x small regulator piston O ring,
  • 1 x large regulator piston O ring,
  • 1 x small set screw adjuster O ring,
  • How to service the HuMa regulator.

They are black nitrile (rubber) O rings.

Please have a look at the Fitting Instructions page for a service video.

The photo is a generic picture of some O rings, not the actual O rings you will receive.

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