Darrell if that's where it's leaking from it's a pretty common problem on pcp guns, if you can hear it leaking from there it probably only needs an o ring.
Or replace it with a foster fitting..
Yep @Wayne52...it was a little o ring...looks like the old one dissolved...scraped it out, put a new 1 on (made sure I lubed it good)...filled the 909...ready to go!...O happy day!
So where do people get their Korean guns tuned now since Saddle Mountain is no more?