Airsoftology: PStar F1 & Jack Review


Jonathan Higgs of Airsoftology got two HPA engines from PolarStar Airsoft the F1 and the Jack. For this review, he installs and compares them to find out which gives a better performance or which can give the most value for the player looking for an HPA gearbox drop-in kit. Which do you think gives the better value?

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