Polarstar Complete O-Ring set for Jack with the exception of the MP7 variant.
No reward points for this product.
A Polarstar Jack system is the promise of a simple, efficient… and incredibly high-performing HPA setup. But like any electro-pneumatic engine, it relies on perfect sealing. And that inevitably means having O-rings in good condition.
With this complete O-ring set for Jack (excluding the MP7 variant), you have everything you need to give your system a second life. Because let’s be honest: a worn O-ring does not last long on the field.
Power loss, inconsistent shots, increasing air consumption… you know the story.
This kit allows you to start again with a clean, reliable, and above all consistent base. Exactly what you expect from a properly tuned HPA setup.
A complete kit for precise maintenance
This set includes all the essential O-rings for the proper operation of your Polarstar Jack engine:
External and internal nozzle O-rings
Front cylinder O-rings
Internal connection O-rings
Nozzle stem O-rings
End cap screw O-ring
Barb fitting O-ring
Screw cap included
Each O-ring is made of Buna 70, a material known for its pressure resistance and long-term durability.
The result: consistent sealing across the entire system, with no weak points.
Why replace your Polarstar Jack O-rings?
It is often gradual… and you almost get used to it.
But a poorly sealed HPA system leads to:
Inconsistent FPS
Loss of range
Overconsumption of air
Less responsive operation
With this kit, you fix everything at the source:
Restored sealing across the entire circuit
Improved shot consistency
Better overall efficiency of the HPA engine
Extended lifespan of your system
Honestly, it is one of the simplest… and most effective maintenance tasks.
Installation and enthusiast tips
Replacing O-rings on a Jack remains accessible, especially if you have already worked on your replica.
Take the time to carefully disassemble each part, clean the surfaces, then install the new O-rings precisely.
A small tip that makes a difference:
Apply a thin layer of silicone grease on each O-ring. It improves sealing and reduces long-term wear.
And above all, avoid “half-done” installs. If you replace the O-rings, do it completely.
What is this Jack O-ring kit used for?
It allows you to replace all the system O-rings to restore optimal sealing and stable performance.
Is it compatible with all Jack models?
Yes, with all versions of the Polarstar Jack, except the MP7 variant.
Why is the MP7 version excluded?
The internal configuration of the Jack MP7 is different, which requires a specific O-ring kit.
Is the kit really complete?
Yes, it includes all necessary O-rings as well as a screw cap for full maintenance.
Is it difficult to install?
No, it is accessible with some method. Clean and precise disassembly is recommended.
Does it improve performance?
Yes, clearly. Proper sealing restores optimal consistency, range, and efficiency.
