Need an adapter for AATX200HC

I don’t know the thread type on TX200HC. It’s an inside thread. What I need is an adapter that will screw in from one end and accept the RWS850 compensator to another side. So one end needs to be threaded and the other one is smooth. Have to have a compensator to make it right and tight. If you don’t, I can mail it to you. Anybody up to this easy task?
Please let me know if you need some additional info.

Thanks!