Tuning 22Cal Diana Stormrider O-ring

[Elblondie]

Hi
I’m looking for an O-ring that should be by the screw circle in red, for my 22 Cal. Diana Stormrider 2nd Gen.

Thanks

 

[MP13]

Metric oo6 or sae A005 will work. Check valve o ring is on fragile side. Add a drop of silicon oil and fill slowly

 

[Elblondie]

Thanks