Aeron B96.

[brucieboy]

Has anyone got one of these and knows the purpose of the bolt and o-ring number 10,right centre.It goes into the valve chamber finish flush with the chamber and seems to do nothing.
https://www.flickr.com/photos/133234.../shares/521WRu

[Sgibbar]

Don’t know but looks like a transfer port machining access. I have to take mine apart again as the trigger set up has gone wrong, so will look at this part as well.