HPA Power Systems
HPA Engines & Gearboxes.
Shop HPA engines and engine-based M4 build components for high-performance airsoft platforms. Build around proven HPA systems designed for fast response, consistent air delivery and competitive speedsoft performance.
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HPA Engines
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HPA Engine Systems
Power Your M4 Properly
Browse HPA engine systems and build components for responsive, reliable and competition-focused M4 platforms.
HPA Engine Collection
Browse Full Collection
Shop HPA Engines & Gearboxes
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AirTac Customs x MAC Gen 3 Cerakoted Skeletonized CRBN Gearbox
Original price was: £110.99.£99.99Current price is: £99.99. Select options This product has multiple variants. The options may be chosen on the product page -
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AirTac Customs x Polarstar Blackout F2 HPA Engine
Original price was: £449.99.£429.99Current price is: £429.99. Read more -
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Polarstar F2 – HPA Conversion Kit – M4
Original price was: £449.99.£429.99Current price is: £429.99. Read more -
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Polarstar Wire Harness Rev. 2
£13.99 Select options This product has multiple variants. The options may be chosen on the product page
Building An HPA M4?
Choose Your Engine Properly.
Not sure which HPA engine suits your M4 or build requirements? Speak to Speedsoft Direct and we can help you match the engine, regulator, air system and supporting components for a reliable and responsive HPA platform.