Furthering my research, I found the attached in Gun Parts catalog and it is very interesting concerning both the 19 & th 23 Sporter.
Serial #125,000 to 127000 is the 23A sporter
Serial E25,000 to 45000 in the Model 19NRA.
This indicates to me that the bbl action is one in the same and that it will fit the sporter and theN NRA model. Look at your serial nuimber and that will tell you what you have.