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Polarstar JACK - HPA Standard FCU Conversion Kit
$347.00 – $352.50
The Polarstar JACK - HPA Standard FCU Conversion Kit. This is the full sized FCU version for easy programming. Contains everything you need internally. Works drop-in with most M4/AK platforms. G&G,...
Polarstar F2 - HPA Conversion Kit
$441.00 – $443.50
Polarstar F2 - HPA Conversion Kit The F2™ incorporates a new one-piece, lightweight poppet valve design yet still operates on the same principle as the Fusion Engine™ poppet. This valve...
Polarstar Fusion Engine V2 Gen3 - HPA Standard FCU Conversion Kit
Polarstar Fusion Engine V2 Gen3 - HPA Standard FCU Conversion Kit. This is the full sized FCU version for easy programming. Contains everything you need internally. Works drop-in with most...