The M1903 Springfield, also known as the Springfield M1903 or simply the ’03, is a bolt-action rifle that served as the primary infantry rifle for the United States military during the early 20th century. Here’s some information about the M1903 Springfield:

1. Design and Development: The M1903 Springfield was designed by the Springfield Armory and was heavily influenced by the Mauser Model 1898. It was adopted by the U.S. Army in 1903 to replace the older Krag-Jørgensen rifle. The rifle was chambered for the .30-06 Springfield cartridge.
2. Action: The M1903 Springfield features a manually operated bolt-action mechanism. The bolt must be cycled by hand to load and eject cartridges. It has a rotating bolt design with dual front locking lugs, which provides a strong and secure lockup.
3. Construction: The rifle has a five-round internal magazine that is loaded using stripper clips. It has a wood stock, typically made from walnut, and a blued steel barrel and receiver. The barrel length is around 24 inches.
4. Sights: The M1903 Springfield was originally equipped with a ladder-type rear sight that could be adjusted for elevation. Later models featured improved aperture sights, which allowed for more precise aiming. The front sight is a blade type.
5. Variants: Over the years, several variants and modifications were made to the M1903 Springfield. Notably, during World War I, a modified version called the M1903A3 was introduced, which simplified production and improved the rifle’s reliability.
6. Service History: The M1903 Springfield saw extensive use in conflicts such as World War I, World War II, and the Korean War. It was used by both regular infantry and specialized units, and it gained a reputation for its accuracy and reliability.

The M1903 Springfield played a significant role in American military history and is considered a classic rifle design. It has also become popular among collectors and enthusiasts due to its historical significance and its place in the development of bolt-action rifles.

Please note that while this information is accurate based on the knowledge available up until September 2021, for the most detailed and up-to-date information about the M1903 Springfield, it’s recommended to consult official sources or references dedicated to firearms history.