RE: Reaction ARF - PST/BTE All-Composite Sport Jet
Sorry Kevin, I just don't have an answer for you. Orings are one of those things I just try to match up at a car parts store or hardware store. They are probably metric, might be tough to find.
Edgar, really sorry to hear about your Reaction. Must have been in a bad spot, because they do glide well. Reaction X is the same bird with longer beak. Makes it easier to balance. Guys really like the longer look - can't remember selling a short nose version since the X was introduced...