Motto Marutto Railgun III (もっとまるっと超電磁砲 III Motto Marutto Rērugan III?, lit. "Motto Marutto Railgun III") is the third episode of the bonus short animation parody of the Toaru Kagaku no Railgun S anime. It was first released on July 24, 2013 as limited external manufacturer benefits bundled in the first Blu-ray and DVD releases of Toaru Kagaku no Railgun S.