FG-Airsoft sent in news about their latest Adjustable AirFlow System Nozzle made specifically for Gas Blowback Rifles made by VFC/Umarex. Interested resellers and distributors can contact them also apart from individual customers on how to get these and other upgrade parts they produce... "These AFS (Adjustable Airflow System) Nozzles allow you to adjust the FPS of your BB gun easily, precisely and give a very stable velocity from 280 to 390 FPS without adding cooldown (these values were mesured using 0.2g BBs, propane gas at 20°C, these values are given for information only and can vary from a BBgun to another).

Velocity adjustment is made without any disassembly, directly throught the ejection port."