Anyone know the proper size for the o ring that goes inside the barrel on a .25 cal Wolverine B-Lite? I am guessing maybe 1.5 X 6 mm. ???? The thing blew out the muzzle so I don't have it to go get another. I think on other Daystates the o ring is on the probe,, but on these Wolverines it is in the barrel. First glitch I hit so far, over two thousand shots. Would have been nice if Daystate sent a couple extra with it.