PolarStar - Fusion Engine Nozzle for M4/M16 SeriesFENZ-M4-BLK
There are currently 6 different nozzles available for the PolarStar PR-15 rifle. Each nozzle has a different bore diameter which allow the operator to shift the velocity adjustment range up or down. The air nozzles are color coded in order of increasing velocity. The color coding also allows field and event staff to easily identify and confirm the safe FPS limit of an airsoft rifle using the Fusion Engine system.
Note: The muzzle velocity with a given nozzle and pressure can vary depending on the length of the barrel. Therefore a shorter barreled CQB rifle will always yield a lower muzzle velocity than a long barreled sniper rifle.
Readings were taken shooting a .2g BB through a stock VFC barrel/hop-up assembly at 120psi.
Color and size of inner barrel from 275mm; 380mm and 509mm :
- Green: 315-365fps
- Gold: 350-400fps
- Blue: 380-435fps
- Black: 425-475fps
- Silver: 445-515fps
- Red: 500-590fps