XM108HP O-Ring size (Madbull)

[kullwarrior]

Hey folks, I need help on this:
My Madbull XM108hp's O-ring kept busting, I suspect its from improper O-Ring size. Currently the two O-ring part that is breaking are found on the "Part #3 Big Valve" Madbull's diagram is confusing me and the tried by fit won't last more than 3 shots with CO2. (It holds gas without leak, but the O-Ring would burst when you fire it)

Current the tried by fit I used are:

R-03 smaller O-Ring on the apical side of the #3 (ID: 1/4, OD: 3/8, Section: 1/16)
R-05 larger O-Ring found in the middle of #3 (ID: 3/8, OD: 1/2, Section: 1/16)


Accoording to Madbull parts diagram...
http://www.madbull.com/catalog/index...id=7&chapter=0



I would like to know
1) The actual, proper size of the two O-Rings
-> The O-Ring kit I use is Buna-N aka Nitrile 70 from princess auto (
2) The part number of the two O-Rings
-> I'm suspecting the smaller one is Number 8 Valve O-Ring. However, the larger one is not shown.

[coach]

Ask Wildcard lol or see if Jugglez has them in stock.

[kullwarrior]

Airsoft parts owner right?

[coach]

Wildcard knows more about these than me as he owned a couple hundred at one time, so he went through a lot of maintenance kits.

Jugglez is airsoftparts