The nozzle is responsible for concentrating the compressed air into a straight beam, propelling the BB out of the chamber and through the barrel. This one from PolarStar fits the F1 HPA Engine and is made of Delrin thermoplastics. Many SCAR-H AEGs with an engine will accept this replacement nozzle instantly.
The white nozzle has three O-rings to provide a complete seal. Without any leaks, the guns muzzle velocity increases and stays consistent. You can expect your gun to show constant numbers when firing through a chrono.
Installing this is very simple. You only have to drop it into the slot, and it will start functioning immediately.