Daisy 717 - no O-ring in bolt

[WebleyWombler]

365 fps is pretty good for such a pistol and the bolt looks like original equipment so I would leave it as it is.

if you really want to gain a few ( and I mean a few) FPS, by all means try an aftermarket probe but I think the cost will outweigh the benefit

[--ped--]

hard to tell from pic but has the old o ring flattened so much that it has filled the groove and just looks not to be there
i'd want an o ring on the probe personally

[WebleyWombler]

i'd want an o ring on the probe personally

So would I , but if the pistol has adequate performance for it's type, is it worth replacing that or the bolt? I'd leave it and enjoy until performance declined

[embee]

The bolt looks like original equipment so I would leave it as it is.

That's what I was thinking as well.
Too much risk for little benefit.

has the old o ring flattened so much that it has filled the groove and just looks not to be there

That was my first reaction too, but it really is just one piece of plastic. No o-ring at all.

Thank you both for your kind input!
For now, I will leave it as it is and enjoy shooting it this way.