Complete O-Ring Set, Fusion Engine (All Models)
Complete O-Ring Set, Fusion Engine (All Models)

PolarStar Complete O-Ring Set for FE (All Models)

$4.99



Order today for same-day fulfillment • Estimated delivery Sep 26–27
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Frequently Bought Together

Complete your setup with the most common add-ons.

PolarStar Complete O-Ring Set for F2

$3.99

PolarStar Heavy Poppet Spring for FE/F2

$2.99

PolarStar Light Poppet Spring for FE/F2

$3.49

PolarStar Complete O-Ring and Screw Set for JACK (MP7 Excluded)

$7.99

PolarStar Wire Harness Rev. 2

$10.99

The Complete O-Ring Set for Fusion Engine (All Models) is a high-quality, durable, and easy-to-install set of O-rings that is perfect for users of the PolarStar Fusion Engine HPA system. High-quality materials improve the performance and durability of the O-rings. The Complete O-Ring Set for Fusion Engine (All Models) includes a complete set of O-rings for all Fusion Engine models. High-quality materials like Viton and Nitrile make the O-rings withstand high pressures and temperatures of HPA systems. You can easily install them in a few minutes using basic tools.
  • High-quality materials
  • Durable construction
  • Easy to install

Common Product Questions

Find quick answers about our airsoft products, shipping and policies.

Can LA Airsoft install this part for me?

Yes. We can build and upgrade Hi-Capas, AAP platforms, and rifles. Choose your base gun and parts, then add the appropriate tech service.

The current custom-build service states that builds are normally completed in approximately 3 to 5 days, with the team reviewing the selected parts for compatibility.

Do I need tools or gunsmithing?

That depends on the upgrade. Simple external parts may be straightforward, but internal upgrades can require disassembly, reassembly, adjustment and testing.

If you are not comfortable working inside your airsoft gun, our team offers professional tech and custom-build services.

How quickly will my order ship?

Orders without preorder items are typically packed the same day when placed before 4:30 p.m. Central Time. Please note that occasional delays can occur during especially busy periods or when staffing is limited.

How should I maintain this product?

Regular maintenance helps preserve performance and reliability. Keep the product clean, follow the manufacturer’s lubrication instructions, and properly manage batteries, gas systems, and internal components. More advanced repairs or internal servicing should be handled by an experienced airsoft technician.

Will this part fit my platform?

Compatibility is product-specific. Check the brand, model, size, and platform named in the product description, such as Tokyo Marui Hi-Capa 4.3 or 5.1, AAP-01, Umarex/VFC Glock, or a particular AEG gearbox type.

Similar-looking parts are not always interchangeable, so contact our team with your exact model if you are unsure.

Will this part increase my FPS?

Not every upgrade increases FPS. Some parts are designed primarily for reliability, cycling speed, weight reduction, or gas efficiency. When a product has a tested FPS claim, it should be stated in the listing.