RA-Tech gives us a preview of their new release for gas blowback rifles. The new CNC Aluminium nozzle is made for the Vega Force Company (VFC) HK416/M4 Gas Blowback Rifles that are equipped with the NPAS System. The shooter can make adjustments on the velocity from 310 to 480 fps or even turn off the NPAS to 0 fps when needed.