Here you go guys and gals. Umarex doesn't have parts for this gun yet. As Haj said, if you take the barrel off, you will destroy the "o" rings and according to the parts breakdown, two are the same and one is different. I don't think anyone at Umarex knows why as of yet.
I had a posting problem getting the schematic to show (and maybe still do) see if this works for you.
https://onedrive.live.com/?authkey=%21AI%2DRIXk1wy6klNQ&cid=E9266565E6FD290F&id=E9266565E6FD290F%212974&parId=root&o=OneUp
I had a posting problem getting the schematic to show (and maybe still do) see if this works for you.
https://onedrive.live.com/?authkey=%21AI%2DRIXk1wy6klNQ&cid=E9266565E6FD290F&id=E9266565E6FD290F%212974&parId=root&o=OneUp