Hurrikane,
The site you reference is known to be loaded with incorrect information.
Back when I started studying and collecting M1icon rifles (40 or so years ago) there was no 'net. Reading books, asking LOTS of questions and writing letters was the norm. I've paid my dues. I'm usually freely forth-coming with the info one asks for but your snydeness does not warrant it. Read the books, write the letters and ask the questions yourself. Good luck on your endeavors, mon ami.
Jon