Bavo

I've got an ICS MP5 which has been sat in bits since about 2005/6 and I've decided I really should fix it and get it up and running since I've gotten back into airsoft. But I need a new air nozzle and I know they were always weird and you couldn't use a standard M4 one as they were too long. I think the correct size was 20.7mm, as it was the same as the old TM XM177, but if anyone can confirm or point me in the right direction it would be helpful. Also this MP5 was before ICS did their split gearbox.

I know it's slightly off topic, but who best to ask, does anyone know if there is a metal upgrade kit available for the KSC P226R and also looking for a treaded barrel as well. Any help is much appreciated.