Type USAPA in your browser. You go to the Army publications site. Go to the Corps of Engineers section. That is the "5-series". Surf around, there is, to quote my old CO, "all kinds of good stuff". As a last resort, find 5-34. In this pub you will find a conservative...
I'll check my collection of obsolete Field and Technical manuals for drawings on the weapon. It's a bit simplistic, but ebay usually has a selection of FM's and TM's on the M1 for sale all the time.
