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Machined and anodized FPS adjustment Air Nozzle for the PolarStar Fusion Engine. This nozzle allows you to regulate the maximum FPS range of your gun. Simply choose the fps range that you are looking for and drop-in the corresponding air nozzle.
The following chart shows the approximate FPS output of the nozzle corresponding to each of the following barrel lengths with .20g BBs at max input pressure 120PSI: