Polarstar MRS Complete O-Ring Seal Set

PolarStar MRS Complete O-Ring Seal Set – Full Regulator Rebuild Kit | HPA Maintenance Kit

Maintain peak performance in your HPA setup with the PolarStar MRS Complete O-Ring Seal Set. This genuine OEM rebuild kit provides every critical seal required to service and restore your MRS regulator. As a result, you can eliminate air leaks, stabilise pressure output, and extend the lifespan of your system.

Designed specifically for PolarStar Modular Regulator Systems (MRS), this kit ensures exact fitment across all internal sealing points. Each O-ring is manufactured from high-quality Buna rubber compounds, selected for durability under high-pressure air environments. Therefore, it delivers consistent sealing performance even under demanding HPA conditions.

In Gel Blaster applications, regulator efficiency directly impacts FPS consistency and air efficiency. Consequently, worn or degraded seals can cause pressure fluctuations, inconsistent shots, and wasted air. By replacing all seals at once, this kit restores optimal regulator function and improves overall system reliability.

Additionally, this complete seal set simplifies maintenance. Instead of sourcing individual O-rings, you receive a full matched set engineered for compatibility. This makes it ideal for both routine servicing and troubleshooting air leaks in PolarStar HPA builds.

Whether you are running a high-performance HPA Gel Blaster or maintaining a competitive setup, this kit ensures your regulator continues to operate at peak efficiency.

Full Component List:

• 1x M1.0 x 2.0 (Buna 90) – Tank Pin OD
• 1x M1.5 x 7.0 (Buna 90) – Tank Pin Retainer OD
• 1x M1.5 x 5.0 (Buna 70) – Divider Wall ID
• 1x M1.0 x 7.5 (Buna 70) – Base OD
• 1x M2.0 x 15.0 (Buna 70) – Piston OD
• 1x 016 (Buna 90) – Divider Wall Counterbore
• 1x Base Seal

For reliable HPA performance and consistent output, a fresh seal set is one of the simplest yet most effective upgrades you can install.

Check out the Whole PolarStar range here.

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For Gel Blaster HPA users, regulator consistency is critical. This seal kit ensures stable PSI output, which directly improves shot-to-shot accuracy and air efficiency. It is particularly useful when diagnosing leaks, pressure creep, or inconsistent FPS in PolarStar-powered builds.

For airsoft and HPA technicians, this kit provides a complete service solution. Instead of partial fixes, you can fully rebuild the regulator in one session. As a result, you reduce downtime and improve long-term reliability.