I have a Jkhan Noblesse in 22. It has a slow leak I need to fix. I am having zero luck finding a schematic and o ring sizes. I did find a place in the UK that sells a kit which is where I’ll probably go. Does anyone have any ideas?
Sounds like you want to do it yourself. I had problems finding info as well. Last routine maintenance on mine was done by Pomona Airguns. Tighten me up real good.