Air nozzle oring

[LazzurusMan]

So checking the air seal in my Sig 556 before I clean it all ready for a re-shim to a new motor, I discovered that the air nozzle is barely sealing. I've removed the nozzle oring and it's had it.

 

However, I don't have anything accurate enough to measure the oring, and I don't know where could possibly stock an oring this small that I can pick up easily. 

Anyone know where I should be looking and what I should be looking for?

[Lozart]

19 minutes ago, LazzurusMan said:

So checking the air seal in my Sig 556 before I clean it all ready for a re-shim to a new motor, I discovered that the air nozzle is barely sealing. I've removed the nozzle oring and it's had it.

 

However, I don't have anything accurate enough to measure the oring, and I don't know where could possibly stock an oring this small that I can pick up easily. 

Anyone know where I should be looking and what I should be looking for?

 

To specify an o-ring you'll need the ID (inside diameter), OD (outside diameter) and the material.

 

Or buy a selection box of small o-rings from Amazon/ebay and keep trying them all until you find one that fits.

 

Personally, I'd just get a new nozzle.

[LazzurusMan]

6 minutes ago, Lozart said:

 

To specify an o-ring you'll need the ID (inside diameter), OD (outside diameter) and the material.

 

Or buy a selection box of small o-rings from Amazon/ebay and keep trying them all until you find one that fits.

 

Personally, I'd just get a new nozzle.

To get a new nozzle means taking the old one somewhere can can scan and machine an exact replica, or buying a second hand king arms Sig 556 to pinch the nozzle out of it. They're unique to the gun. It's a V3 gb that sits far enough back from the hop unit that it has a very long nozzle to work properly. I should be able to find a replacement oring somewhere.

[Adolf Hamster]

16 minutes ago, LazzurusMan said:

To get a new nozzle means taking the old one somewhere can can scan and machine an exact replica, or buying a second hand king arms Sig 556 to pinch the nozzle out of it. They're unique to the gun. It's a V3 gb that sits far enough back from the hop unit that it has a very long nozzle to work properly. I should be able to find a replacement oring somewhere.

 

worth measuring the nozzle and having a look to see if there are ones for other guns in the same length?

 

there's a few guns run a longer nozzle.

[LazzurusMan]

So I found a video on youtube that apparently shows you how to restore old o rings.

Heat up some cooking oil, not too hot, and put the oring in for a few minutes, then leave to cool.

And I swear I'm not pulling any legs, it worked. My piston/cylinder/nozzle now have a pretty perfect seal. Like, I can't believe it actually worked.

[Shamal]

Yeah it's true and they are particularly tasty with onion rings.😉