Tuning Sheridan Blue Streak O-ring

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Anybody have any idea what size the O-ring on the probe might be? Mine is starting to leak after 45 or so years it's all original and still shoots great but I'm losing power might be a time for a rebuild. Still killing squirrels though! Just have to keep the shots close.

RB

 

[kayaker]

20cal. is 004

 

[JW652]

Check out J.G. Airguns. The website probably has the information you seek. They should be able to provide either a single seal or a seal kit. Nice helpful folks who have been in the business for a long time and are very friendly.

 

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Thanks!

 

[kayaker]

Also Mac-1 or backer air guns