The M1903A3 is a variant of the M1903 Springfield, a bolt-action rifle used by the United States military. It was introduced during World War II to improve production efficiency and reduce costs. The M1903A3 features a simpler rear sight and a more streamlined manufacturing process, making it easier to produce in large quantities. This rifle is chambered for the .30-06 Springfield cartridge, which provides effective range and stopping power. The M1903A3 was widely used by American forces during the war and remained in service for several decades, becoming a symbol of American military history.