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All Springer/NP/PCP Air Gun Discussion General > Machine Shop Talk & AG Parts Machining

Looking to remake a bolt probe with O-ring?

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Kilohead36:
I am looking for someone to remake a bolt probe to properly seal off barrel for .30cal don cothran based gun. I had a delrin sleeve made a long time ago and it was a fix. I cant use a inner o-ring in the barrel. However after I acquired more expensive guns I would like to properly fix it.

Ronno6:
What does it look like?

Gippeto:
 A bolt is not a big deal to make, and there are a whole bunch of guys here who could knock one out for you, but you need to be able to provide some real information.

How about pictures of your current setup? If you could supply an accurate drawing with dimensions, that's a great starting point too and would go a long way toward finding some help.

Stock bolt (brass) and a replacement in stainless for a Baker breech that was fitted with a .30 pellet barrel...nothing too difficult at all.



Regards,
Al

Kilohead36:
I will upload pics later today. Current probe is from a bnm breech

Gippeto:
Pics from an email Wayne sent. On the surface, a new bolt nose seems like it might be a simple job, but I'm not familiar with the BNM breech. From the email, it seems there may be an issue with the location of the transfer port conflicting with a probe oring...maybe Wayne can explain that better or send some pics of the pieces dis-assembled to show the problem area?







Al

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