Hi All

I need to replace the two O-rings that are on the main valve of my HW100K. The main air cylinder is fine, as I filled it up a couple of days ago and it has remained full. The problem is when I screw the cylinder into the main valve assembly it just loses its air quite rapidly. I have sourced the o-rings necessary and they are £2.50 each from an online parts supplier. Is there any place I can source them in bulk a bit cheaper ?, as I would like to have a few spare. Also is the task of swapping the o-rings an easy thing to do or is it a gun shop job ?, as I don't want to damage my air rifle.

Regards

Ian