I am selling my Riva reduction nozzle for my RXT-x this is one that actually fits the RXT I think Riva stopped making these and only sell ones for the RXP and you have to moddify it to fit a RXT.

I have 3 rings it came with 81,82,83 I had them changed to 83,84,85 and when I did this 2 of the rings had a little machine burn like what you would see in a wear ring I will get pictures if you need them

Price 200 shipped in US