The Mannlicher M1903 is a bolt-action rifle designed by Austrian engineer Siegfried Mannlicher. Introduced in 1903, it features a unique straight-pull bolt mechanism, allowing for faster cycling of rounds compared to traditional bolt-action rifles. The rifle was chambered for the 6.5×54mm Mannlicher cartridge, known for its accuracy and manageable recoil. The M1903 was primarily used by the Austro-Hungarian Army during World War I and saw limited use in World War II. Its design influenced later rifle developments, and it remains a notable example of early 20th-century military firearms engineering.