PolarStar

PolarStar — the HPA engine pioneer, and the platform that proved compressed air could run an AEG. Drop-in engines that replace a gearbox entirely, from the F2 to the mechanical Kythera.

PolarStar were converting AEGs to run on air before most of the hobby had heard of HPA, and their poppet-valve engines are still a benchmark for tunability. The F2 and Fusion Engine swap a V2 or V3 gearbox for an electronically controlled air system, the JACK offers a simpler conversion, and the Kythera brings a mechanical HPA engine for players who want air power without the electronics. The Modular Regulator System feeds any of them a clean, adjustable supply.

What we stock

We carry the F2 and Fusion Engine GEN3 drop-in kits, the JACK conversion kit, the mechanical Kythera engine, the Modular Regulator System and spare F2 and JACK nozzles.

💡 Titan Forge Airsoft tip: Engine choice comes down to how much you want to tune — the F2 is endlessly adjustable, the Kythera keeps it simple. Compare them in our HPA engines.
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