Hatsan At44 nicked seals

If you post a parts diagram noting which orings you need, I will help you out with sizing. I have a hatsan gladius. The gladius is the same action as the AT44.
The problem is that I don't know what I don't know. The issue is that the gun has sat for over 3 years since it was made. I suspect that the orings could have dryrot. Not yet able to afford to get a pump so I'm not able to test my theory.

Thank you for your response
 
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Here's the AT44 o-ring list that I found several years ago. The barrel o-rings are #608. Here's a link to them on O-rings and More: https://www.oringsandmore.com/metric-buna-o-rings-7-66-x-1-78mm-minimum-100-pcs/

HatsanAT44 O-rings.jpg
 
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