fusion engine nozzle mp5 guldOur range of Fusion Engine nozzles allow you to change the muzzle velocity of your rifle without adjusting the pressure (although it may be necessary to adjust the DP setting on your FCU). The nozzles are easy to install and usually take less than 5 minutes to replace on most models from start to finish. Each nozzle is machined from aluminium and comes with both internal and external o rings. The nozzles are colour coded using anodising for easy