I just finished reassembling a G6 squired from a member of this site.
It is like new in the box but the front seal had crumbled.
It was an interesting disassembly without an exploded view!
The seal was over sized and required trimming but I wasn’t sure how much!
I did a measurement of the cylinder to .001” and trimmed the seal .001” over that .
measurement.
I hope to get to shoot it at a target tomorrow and see what it is capable of!