Had it in bits again today, quite enjoying farting around with it. It helps that it’s a doddle to strip. The only pain is the barrel and linkage, so I may make a sleeved screw for that, so the barrel can stay on.

Cut a grove at the back of the piston. They must factory harden these, really struggled with the parting tool so took the harder outer off with a toolpost mounted grinder. Once the the worst of it I was able to cut a nice groove with a 3mm parting tip.




Turning the delrin bearing/ring. I don’t have a boring bar so had to improvise with a router bit.




Finished job on the piston, makes it much nicer to cock. Also made a top hat out of Delrin.
It’s quite pleasant to shoot, I was surprised at the groups I was getting just resting on elbows on the bench. It’s right on about 11.8 with AA’s, about 11.5 with hobby, and it groups them surprising well, which will do me as they are a bit cheaper and should fly a bit flatter.
Might have a play on the stock tomorrow, I fancy giving it an adjustable cheek piece.