Mad Silence is a metalcore act from Malyn in the Zhytomyr Oblast, formed in 2025. The band delivers the paradoxical fury of their oxymoronic name from the Ukrainian countryside.

Madafaka is a thrash 'n' roll and metalcore act from Glasgow, active since 2012. The band blends the groove of thrash with metalcore's aggression and the loose energy of rock 'n' roll.

Maelstrom Aeterna is a melodic death, groove metal, and metalcore band from South England, formed in 2014. They blend melodic death metal with groove metal's rhythmic power and metalcore's dynamics.

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Mahoney is an atmospheric sludge metal and metalcore band from Nakkila, Finland, formed in 2016. They blend atmospheric sludge's expansive textures with metalcore's aggressive dynamics.

Maintain is a melodic death metal/metalcore band from Hamburg, Germany, formed in 2015. Their sound bridges the melodic sensibility of Scandinavian-influenced death metal with the breakdown-driven intensity of metalcore.

A groove metal and metalcore act from Roeselare with influences drawn from Meshuggah, Crowbar, and the Melvins, Makasrr released their debut Inner Demon to attention in the Belgian underground press. The five-piece—built around the guitar pairing of Gerald Goedhart and David Decoutere—deliver dense, polyrhythmic heaviness with a sludge-informed low end.

Make Them Die Slowly is a melodic black metal and metalcore band from Birmingham, England, formed in 2020. They blend melodic black metal with metalcore's aggressive dynamics.

Maltraxx are a metalcore band from Styria, Austria, formed in the 2010s and active on the Austrian core scene. Drawing comparisons to Parkway Drive, As I Lay Dying, Gojira, and Arch Enemy, the band released their album 'Our Name' in 2023 as an independent act. They have been featured by the core community as a representative voice of the Austrian metalcore underground.