40mm Grenades

It seems that the green gas I have been using in my grenades has wrecked the valve seals. Can anyone recommend a place to purchse replacement parts that will work with green gas?

from reading around these should be the right ones you may just have to check the size, can seem to findthe king arms replacement parts anymore but these are a lot cheaper.

http://www.mcmaster.com/

--O-Rings: Part Number: 9452K58 (pack of 100)--
--Bearing Part Number: 9292K33 (pack of 100)--

and this is the link to the thread about fixing all the leaks and problems with them
http://www.arniesairsoft.co.uk/forums/index.php?showtopic=135390&hl=grenades

Cheers mate. Will check it out. the link to Arnies airsoft didn't work by the way. Maybe you could print it off and give me a read? Get it off you in work while you doing nowt!!!