I finished the book. It was an indispensable for someone who is new to Uzis who is considering buying a select-fire one, or who already owns one.
After reading the chapters on the Group Industries and Vector and how they built their guns, I have the impression that some of the guns have issues that needed to be addressed that the companies themselves took care of when they were in business. Thus I am a bit concerned about buying one.
Also, I was wondering if decide to buy an old Action Arms Uzi semi-auto carbine if it might be a problem buying extra parts in the future. For example, I learned that it has a different extractor than a select-fire one. So I am wondering how hard it would be to find a replacement extractor if needed.
Once again, I have only been on this forum a relatively short time and am very new to the Uzi.