Provides a detailed examination of this famous military rifle on a part-by-part basis. Every variation in every part is documented and matched to the serial number range of its use. Thirty-one different variations of the rifle were developed over the 41 year course of its production and all are described and identified. Appendices provide additional information on serial numbers, production numbers, ammunition, inspection procedures and markings, lists of military and civilian inspectors and their markings, the National Match rifle and the rare and highly classified Pedersen device that converted this bolt action rifle to a semiautomatic rifle during World War I with never-before published original factory photos.Covers the entire range of the Model 1903 rifle from the rod bayonet to the M1903A4 sniper rifle. 4th. Edition. S/C. 477p.