Tuning Need help with mystery O-ring size - FX Impact MKI

[Tominco]

While I'm waiting on FX to respond to my email, I figured I'd post here to see if anyone here knows the answer to this mystery. 

MKI very early edition Impact. It's got a leak coming from a screw & bring that is not listed on the MKI or MKII schematics from the FX website. 

In the pic below, you can see the screw that I'm referring to. It's a small brass screw with an o-ring on it. 

But, here's a screen shot of the exploded view for the MKI from the FX site. No arrows or lines point to that location. 

Does anyone here happen to know what size that o-ring is?

I'd like to start moving in the direction of replacing it. 

Thanks!

Tom

 

[Theman406]

Should be a A25 o-ring 2x1nbr70

 

[capefeargunr]

2.2 x 1 NBR 70.

There is another one under the edge of the bottle connector.

 

[Tominco]

Thanks for the help. 

It's been few days since I sent the email to FX. But, this morning, they flexed their Customer Service muscles a little. I got 2 emails... One telling me that is part #A24 and A25 and the o-ring is a 2.2x1 NBR 70 (thanks @caprfeargear), and another email telling me that an order has been generated and the o-rings are on their way to me. 

Well done, FXUSA! 

Here's a screen shot of parts A24 &A25 from the schematics. It makes it look like they go in from the side of the rifle and, if you notice, there's an A24&25 set on the left and an A24&25 set on the right. 

Thanks for the help! 

Tom

 

[2L8]

2.2 x 1 NBR 70.

There is another one under the edge of the bottle connector.

Thank you as well, this will help a friend of mine with the same leaking problem.



Patrick