Cannot get a seal at the probe.

[angrybear]

OK, well best I dive in to my bits box & see if there's a spring that fell out,
I need to strip it again anyway as I think the hammers got my short pip fitted & I still need to lose around 130 fps.

[Ca_Varminter]

Here is another photo...
It more of a dished shim, not very thick....


Stuart

[Dr Bob]

Here's my version as it does both the mk1 and mk2 .

[angrybear]

Mine is one of yours Bob, it was me that had the .20 probe sent in error, there was a washer but it looks flat to me 

Anyway I just looked at the old non adjustable bolt & there's a wavy spring sat inside, so fished it out & fitted it to the probe.