HPA Systems

Updated for an Off-Center World

The offset version of the F2™ is the first true closed bolt offset HPA conversion kit on the market and, although it took a while to develop, we are pleased to say it is worth the wait. The F2™…

POLARSTAR F2™ HPA Conversion Kit - V2 M4/M16Attention: QD Fitting not included and Sold Separately

The F2™ incorporates a new one-piece, lightweight poppet valve design yet still operates on the same principle as the Fusion…

POLARSTAR Kythera SA™ Conversion Kit, Semi-Auto, V3, AK 6Features∙ Designed from the ground up as a high performance mechanical HPA system, not a modification of a solenoid operated design
∙ Patent pending valve mechanism…

POLARSTAR Kythera SA. Conversion Kit (Single Shot) Semi Only. V2/ M4, M16Features∙ Designed from the ground up as a high performance mechanical HPA system, not a modification of a solenoid operated design
∙ Patent pending…

POLARSTAR F2™ Conversion Kit for VFC HK417/G28Attention: QD Fitting not included and Sold Separately

The F2™ incorporates a new one-piece, lightweight poppet valve design yet still operates on the same principle as the Fusion…

POLARSTAR Fusion Engine™ Drop-In Kit, V2 GEN3, M4/M16 – Red *LFP/Red *NZThe Original HPA Rebel

The Fusion Engine™ was released in 2011 and was the first new HPA system to hit the airsoft market in over two decades. This is…