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Ultra not so sweet.


manthing
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Thanks for the help and advice so far peeps.

Upon closer inspection the bolt seems to be in good condition and cycles perfectly without a mag in, so I'll have to run both mags though it later and see if both are causing the "graunchy" or just one. Is there a problem with the mags not lining up with the barrel?

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2 minutes ago, manthing said:

Thanks for the help and advice so far peeps.

Upon closer inspection the bolt seems to be in good condition and cycles perfectly without a mag in, so I'll have to run both mags though it later and see if both are causing the "graunchy" or just one. Is there a problem with the mags not lining up with the barrel?

That is good news re the bolt. Have you inspected the probe o ring ? You might need a magnifying glass,,,, I had one split and to the naked eye looked OK.

Another fault option maybe the holes in each mag doesn't line up ? I'd bet it's the probe o ring that's split 🤔

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Try a small amount of sm50  lube on your probe and mag orings  

Also if your using short pellets .that the mag can over rotate and not line uo properly. Jsb  Express and rs  are known for this .

Try exact 8.4 s or bismags .both longer and likely to feed very well .

If your orings get too dry they can snap and jam .

Oxidised pellets can dry them out  

Edited by Ultrastu
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