Need O-ring for Hahn 45

[shiirooms]

Picked up a bunch of old pistols of which one is a PY Hahn 45, an older first series version. Discovered the O-ring that seals the co2 cartridge neck is missing. Looked everywhere I can think of on the net and local hardware stores to find one that may fit. Anyone know what size this would be, and do you know here to buy two? Crosman discontinued support for this gun. The only place I found parts, sold a total rebuild kit for +$60. I only need the O-ring to determine if a rebuild is worth it.

[BillK]

Do you have a Crosman part # for the Oring?  Is there another Crosman gun that is the same style/build that you can get a part # from that? 
I'm not familiar with the Hahn so, "crasping at straws".  Crosman has used the same Orings on many models and so do still have many in stock.  You need to find a part # or another Crosman gun of the same.

[ped]

problem here is that older models were revamped with a flat seal and retainer and there were a few different valve dimensions
on my sa6 which came with no cart seal I just fitted an up rated europhane 22xx cart seal ,pushed straight in and once cart is in can't come out

[shiirooms]

I found a copy of Crosman's part list and diagrams from 1992. Crosman's site indicates no parts available for the model 45. A note from the part diagram indicates the 45-17A O-ring neck seal should be replaced by removing O-ring and inserting 45-52 seal and 45-51 seal retainer. On the later model guns, Crosman changed the design of the valving system such that parts aren't interchangeable between older models, unless you change out the total system.
What I am looking for is, has anyone found a suitable replacement O-ring and what size is it? I have tried a #109 1/2-15/16-3/32 and #11 1/2-15/16-1/16. The #109 may work if I can insert it somehow. The original ring may be metric too.

[BillK]

OK...I think this is it...or maybe not...
http://www.jgairguns.biz/catalog/index.php?manufacturers_id=10&sort=2a&filter_id=158&page=2

Good luck...

[shiirooms]

Thank you BillK. Looked them up and I ordered the pieces I think I need. Appreciated.