The "encyclopedia of Jim DiEugenio" is full of false information. He has a poor grasp of the facts surrounding the assassination. It was a shock to me when I came to that realization. Here is something from the last "conversation" that I had with him:
"In Italy, many factories turned out the MC rifle. And there was no regimentation as to the production scheme. If a factory was in Terni, there would be a T prefix and then the number. Therefore, the idea that the serial number was probative is simply wrong."-- James DiEugenio
What I’ve found over the years of studying the Kennedy assassination is that no one is an expert on every aspect of the case. It’s nearly impossible to have an expert level knowledge of the legal stuff, the scientific stuff, the medical stuff, intelligence records, etc. Most researchers know certain aspects like the back of their hands while being a little fuzzy in other areas.
I assume Jim isn’t an expert on firearms fwiw.