Hello,

I'm in the process of renovating a 30+ year old Gamo CF-16. It's the first time I've taken an airgun apart, but all seems to be going OK. I've taken a load of pictures and will start another thread at some point if anyone is interested in seeing the rebuild. However, would appreciate some advice on installing a piston sleeve. The pictures show the piston (minus seal), trigger sear and cocking shoe (still to be sanded & polished).

Cocking Shoe

Piston

There seems to be room for a piston sleeve, with >1mm clearance around the radius of the spring and the piston wall. I've got a sheet of 0.5mm PTFE ready to go. My question is whether it is likely to cause problems with the sleeve covering the cocking slot & what I'm guessing is the hole which the trigger sear engages?

I guess it may be trial and error to see if the cocking shoe rubs against the sleeve.

But I could stop the sleeve short of the end of the piston to leave the final cutout unobstructed.

Any thoughts?

Cheers in advance,
Richard