Impact liner o rings

[Keyman62421]

Is the liner supposed to have o rings? Pulled my liner to inspect and there are NO o rings!

If so, what would be the size and approximate position?

Had to edit, stupid me. 25 cal 700mm barrel.

 

[Buck_FXUSA]

Hey Keyman, 

Your liner should have had o-rings, 3 I believe. Maybe they are stuck in the outer barrel tube? I hope they are not missing. 

The size of the o-rings for the .25cal liner are 5.5x2.0mm NBR70 (FX number 19953 if you need to order them.) The 3 o-rings should be equally distributed over the liner, so one every about 9 inches. 

 

[JCD]

There have been discussions on whether or not they are 'needed' (accuracy with/without) since the liner is tensioned by the front barrel nut. I don't have an impact anymore and I never removed those orings for testing. I wouldn't stress over them being missing but I would make sure they are not in the barrel tube, it would make putting the liner back in rather difficult. If you do put orings back in, I've seen folks use a few wraps of tape on the liner to help hold them in place while inserting in into the barrel. If they are in the tube, you can just shoot them out via a dry fire (without the liner) into a pile of rags or the like.

Again, I've never done it, just stuff I read here.

 

[Brian10956]

When I purchased a new slug liner it came without oring and I was told that’s how they come from the factory. I added some on my own. I guess FX wanted to save 25 cents on each liner.

 

[tor47]

If they are in the tube, you can just shoot them out via a dry fire (without the liner) into a pile of rags or the like.

Do not do that, You might blow out some small O-rings which are in the barrel tube also. If that happens they are almost impossible to put back, without heating and removing the endpeace of the barell tube.

 

[JCD]

If they are in the tube, you can just shoot them out via a dry fire (without the liner) into a pile of rags or the like.

Do not do that, You might blow out some small O-rings which are in the barrel tube also. If that happens they are almost impossible to put back, without heating and removing the endpeace of the barell tube.

Tor, educate me.... With the bolt closed and thus the probe covering the oring in the brass barrel fitting, what oring would be at risk?

 

[n2stuff]

Never dry fire without the liner. There is a thin oring that will shoot out too. Like said above you will then need to heat up the brass and SS piece to reinstall that little sucker. Mine come out when just changing liners on my Wildcat. When you heat those 2 parts remember to remove the other orings inner and outer. The 2 parts are locktited together. 

 

[tor47]

 

If they are in the tube, you can just shoot them out via a dry fire (without the liner) into a pile of rags or the like.

Do not do that, You might blow out some small O-rings which are in the barrel tube also. If that happens they are almost impossible to put back, without heating and removing the endpeace of the barell tube.

Tor, educate me.... With the bolt closed and thus the probe covering the oring in the brass barrel fitting, what oring would be at risk?

Check this:
https://www.airgunnation.com/topic/fx-crown-how-to-fix-the-oring-that-comes-out-when-you-dry-fire-the-gun/

 

[Bob_O]

If the liner O-rings slip off when you remove the liner, they will just fall out if you hold the gun vertically.

 

[JCD]

Thanks. I wonder if the video is still out there showing to fire them out. I won't mention who's video it is/was.....