I don't know what to think. The suppressor doesn't really change when you attach it does it? I don't think any entity defines a suppressor differently depending on weather it is attached or not. I'm curious as to why you believe it being attached is CCW a suppressor, but not unattached.
I am kind of on the side with dustin here, the supressor attached to the pistol should be a non issue, provided that it does not drive the barrel length over 16 inches.
Furthermore the official definition of pistol does not exclude the berretta 93R or Glock 18.
http://www.oscn.net/applications/oscn/DeliverDocument.asp?CiteID=69759
Well, the G18 and 93R are illegal carry as the SDA states derringer, revolver or semi Automatic in Section 2.
As far as the Suppressor, I will agree there is no definition excluding it. However, since BATFE considers a suppressor, in and of itself, a firearm, AND since the OK Statutes do not define suppressors, law interpretation in a court case will default to BATFE definitions.
Huge grey area, and I doubt anyone will know the correct answer until its tested in court.