Redwolf hp o-rings???

Does anyone know the sizes of the o-rings for a redwolf hp in. 22.

Mostly interested in the barrel ones. The two on the outside of the barrel, where it inserts into the action. 

Thanks

Looks like different specs for HP vs LP
1592621672_3971028865eed7a6879c495.81802710.png
1592621672_11100027315eed7a689fcbd8.84639310.png

 
Number 18 are the ones I need. For some reason I have nicked the first one. 

Wondering if it's not happening when passing the transfer port.


I have a .25 HP. Assuming the barrel was never out as new, the rear O ring was cut when I pulled my barrel. Upon closer inspection,... there was a burr in the action at the transfer port. It 100% would have cut the rear ring. Have a look-see there. I de-burred by hand and never had the barrel out since.
 
What is the function of the #18 O-rings? Do they flank the transfer port and seal the flow of air? Or are they purely to hold the end of the barrel snug? I experienced a ~20 FPS reduction in speed in the 10 days of shooting my Red Wolf but things have somewhat stabilized. I did not remove the barrel before observing this reduction in FPS, however I have since remove the barrel but did not inspect the O-rings. Wondering if the #18 O-rings could be part of this cause.

Any wisdom/input is appreciated.



Thanks,