The CO2 one? If you drill a hole through the air nozzle that might be enough. In fact if you can find a nozzle from the non-export edition of the Uzi (328-350 FPS, usually branded as Cybergun) and install that it'd be just as effective
I'd rather not drill it, but installing a new nozzle seems a good idea. I wouldn't mind using a heavier weight BB though if it meant the FPS could be lowered effectively. I guess it depends on how much the nozzle is to buy and ship over. Thanks for the advice. Can anybody comment on the reliability or quality?