Includes a part-by-part analysis of what has been called 'the rifle with the smoothest bolt action ever designed'. Changes to all parts are analyzed in detail and matched to serial number ranges. A monthly serial number chart by production year has been devised that will provide the collector with the year and month in which their rifle or carbine was manufactured, and a history of it's development and use is included. The mystery of the so-called Philippine Constabulary rifles is solved and the 'School' rifle is introduced. A new and complete exploded view was produced for this book. It also contains a complete discussion of the .30 Government ammunition and it's variations developed for the Krag, as well as instructions for the assembly/disassembly of the rifle and carbine. 317pp.