Collection: HPA Engine

Upgrade your Gel Blaster with a high-performance HPA engine from PolarStar. This collection includes JACK and F2 conversion kits for compatible Version 2 and Version 3 gearbox platforms, offering responsive operation, consistent air delivery and adjustable performance for custom HPA builds.

Choose the correct gearbox version before ordering. An HPA tank, regulator, air line and compatible battery may be required separately. Professional installation and tuning are recommended for reliable operation.