'''M1903''' may refer to:
[[File:Colt Model 1903.jpg|thumb|right|Colt Model 1903]]
[[File:Springfield Armory M1903A3.jpg|thumb|right|Springfield M1903A3]]
[[File:Springfield Armory M1903A4.jpg|thumb|right|Springfield M1903A4]]
* A weapon:** The [[Colt Model 1903]], a [[.32 ACP]] pistol** One of the Springfield M1903 rifles, all of which are chambered for [[.30-06 Springfield]]:*** The [[Springfield M1903A3]], a conventional rifle*** The [[Springfield M1903A4]], a precision rifle
[[Category:Disambiguation pages]]