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Found this great list of Daystate Orings

April 16 2017 at 6:04 PM

db  (Login Diamondback)

Response to Airwolf CDT question O-Ring size

Taken from the above referenced post:

"Please note that DayState uses both Imperial or Metric O-rings. For Imperial O-rings, either the British Standard dash number (BS-xxxx) or American Standard dash number (AS568-xxxx) will work.

Bolt O-rings (aka Pellet Probe): Air Ranger, Air Wolf, MK4, Huntsman, Regal – FAC:
.177: -003 Buna-N A90
.20: -004 Buna-N A90
.22: -004 Buna-N A90
.25: -005 Buna-N A90

Bolt O-rings (aka Pellet Probe): Air Ranger, Air Wolf, MK4, Huntsman, Regal – 12 ft/lbs:
.177: -003 Buna-N A70
.20: -004 Buna-N A70
.22: -004 Buna-N A70
.25: -005 Buna-N A70

Piston O-rings: (AR, AW, MK4, HM RGL):
–006 Urethane A90 "


Videos of leak & repair:
Part 1 -
Part 2 -
Part 3 - (This vid states a size 006 oring in check valve)
Part 4 - (Dowdy Seal replacement)
Part 5 -

fixed a similar leak in my FX Typhoon / Logun Solo. I used a size 006 oring to fix mine. Brother Tom used size 005 in his. Worked for us as long as the size is close enough.

Here is a link with some pics (not mine) showing the cone shaped part in an FX:

Tom's post:


Truth is Stranger than Fiction..... wink.gif

This message has been edited by Diamondback on Apr 16, 2017 7:02 PM

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