That's very courteous of you @Tnmallen
I know Airgun Revisions listens in on AGN
You might try posting your question there.
You could also send a PM thru that platform
Edward
This is the most recent one that I could find on the Crosman website,
You could also contact Airgun Revisions to see if there are more up to date publications
Hope this helps
Edward
https://support.crosman.com/hc/en-us/article_attachments/201669704/CH2009A515.pdf
I buy individually sized rings from The O-Ring Store
They are reliable, and ship quickly
And have an excellet supply of metric and AS568 O-rings in stock in a variety of materials
https://www.theoringstore.com/store/
When I buy a new (to me) gun I buy an O-Ring kit from eBay seller R&S for my...
I have had my FX Crown MkII 22/380mm for about 2 years.
I have not touched it, not even for a breech O-ring in that time.
It was set up, tested, and tuned exactly as requested by Tony at Talon Airguns upon purchase.
just my 2 psi
Edward
You may this already, but in a pinch, you could try a #110 standard o ring (90 duro)
The dimensions are very close
9.19 x 2.62 mm
Take a look at the attached screenshot
Hope this helps
Ed