M1915 may refer to: 305 mm howitzer M1915, Russian artillery piece 37 mm trench gun M1915, Russian artillery piece Standschütze Hellriegel M1915, Austro-Hungarian submachine gun Ruby M1915, a self-loading pistol used as a French World War I sidearm Beretta Model 1915, an Italian semi-automatic pistol in World War I
See also M1916 (disambiguation)