Polar Star Fusion Engine M4 M16 Airsoft Nozzle Red
The Polar Star air nozzles come in different bore diameters allowing players to change their FPS for different occasions.
The user can easily shift the velocity adjustment up or down depending on FPS and or target range.
RED Nozzle ratings with different barrel lengths (FPS may vary depending upon bucking and PSI output):
275MM = 500 FPS.
380MM = 550 FPS.
509MM = 590 FPS.