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The Springfield M1903, formally the United States Rifle, Caliber .30, Model 1903, is an American magazine-fed, bolt-action rifle used primarily during the first half of the 20th century.
It was officially adopted as a service rifle on June 19th 1903, and was officially replaced as a service rifle by the faster-firing, semi-automatic M1 Garand, starting in 1936. The M1903 saw notable use in World War I and World War II, and some cases in Vietnam. It was also used as a sniper rifle in WWII, Korea and Vietnam. Furthermore, it remains in use as a civilian firearm and among some drill teams into the 21st century.
The basic time line is that work began on creating a rifle that could handle higher loads and adopted some of Mauser's features, began around the turn of the century by Springfield, with a prototype produced in 1900, and going into production in 1903, thus gaining its nomenclature. There was actually an interim rifle that almost entered production, the Model 1901. Springfield was sure enough that the Model 1901 would be accepted that they began making some parts, but it was not accepted and further changes were asked for. The design was further modified and accepted, type classified and entering production in 1903.
The War Department had exhaustively studied and dissected several examples of the Mauser Model 93 rifle captured during the Spanish-American War, and combined features of both the U.S. Krag Rifle Models 1894-1898, and the Mauser Model 93, to produce the new U.S. Springfield Rifle, Model 1903. Still, the 1903's used so many design features from the German Mauser that the U.S. government paid royalties to Mauserwerke.
By January 1905 over 80,000 of these rifles had been produced at the federally-owned Springfield Armory. However, President Theodore Roosevelt objected to the design of the bayonet used (a rod-type) as being too flimsy for combat. All the rifles to that point consequently had to be re-tooled for a knife-type bayonet, called the M1905. A new improved Model 1904 sight was also added.
The retooling was almost complete when it was decided another change would be made. It was to incorporate improvements discovered during experimentation in the interim, most notably the use of pointed ammunition, first adopted by the French in the 1890s and later other countries. The American rounds with this feature to be used in the Springfield were designated "Cartridge, Ball, Caliber .30, Model of 1906"; this is the famous .30-06 ammunition used in countless small arms to the present day. The rifle's sights were again redone to compensate for the speed and trajectory of the new cartridges. The round itself was based on the .30-03, but rather than a 220-grain (14 g) bullet fired a 2,300 ft/s (700 m/s), it had a 150-grain (9.7 g) pointed bullet fired at 2,800 ft/s (810 m/s); the case neck was a fraction of inch shorter as well.
Additionally, tests revealed that the design was effective with a short, "cavalry-style" barrel of 24 inches (610 mm) in length, so the decision was made to issue shorter rifles to the infantry as well, an innovation during a time when long rifles for infantry were the norm.
As a whole, these changes led to a vastly efficient and deadly shoulder arm. Some dubbed it the "weapon of the silent death," since a person could be struck by its bullet before ever hearing the weapon's report.
World War I
By the time of U.S. entry into World War I, 843,239 of these rifles had been produced at Springfield Armory and Rock Island Arsenal. The demands of the war, however, spurred the production of an additional 265,620, still not nearly enough to train and arm American troops. This prompted production of 2.5 million of the U.S. Model of 1917 (M1917 Enfield), also in .30-06 caliber, but from British (Enfield) P13 and later P14 rifle designs. Most US soldiers were in fact armed with M1917 rifles during the conflict. Towards the end of the war, Springfield turned out the Model 1903 Mark I. The Mark I has a cut on the left hand side of the receiver meant to act as an ejection port for the Pedersen device, a specialized insert that replaced the bolt and allowed the user to fire .30 caliber pistol cartridges semi-automatically from a detachable magazine. The stock was also slightly cut down on the left side to clear the ejection port. In all other respects, the Mark I is identical to the 1903.