M31

M31 or M 31 stands for:

• Messier 31 , the Andromeda Galaxy
• M31 ( GMLRS-U ) , like the M30 artillery missile, but with an 81.6 kg fragmentation warhead
• Autópálya M31 , motorway in Hungary
• Messerschmitt M31 , a sports and training aircraft

This is a disambiguation page for differentiating between several terms identified with the same word.