M.I. is a thrash/groove metal band from Arendal, Norway, formed in 2023. They blend thrash metal's velocity with groove metal's rhythmic punch.

M.I.GOD. is a progressive modern metal band from Nuremberg, Germany, active since 2001 with four albums spanning from "Bionic" through 2012's "Floor 29." The four-piece, anchored by drummer/producer Michael Sopolidis, crafts technically demanding compositions that blend alternative rock accessibility with progressive metal complexity.

Buzzsaw is a black/speed metal act from Split, formed in 2023 and delivering razor-sharp aggression from the Dalmatian coast. The band channels the raw velocity of speed metal through black metal's cold aesthetic.

MacAnimal were a hard rock and heavy metal band from the Amstetten-Ybbstal area of Lower Austria, active through the first half of the 1990s with an internationally composed lineup. The band built a strong regional following across the Mostviertel and beyond, playing the stages of the Austrian metal circuit during a formative era for the domestic scene. They are documented in the Encyclopaedia Metallum under groove and thrash-inflected heavy metal.

Mad Brains is a death and groove metal band from Agrigento, Italy, formed in 2022, incorporating industrial elements. They blend death-groove metal with mechanical industrial textures from Sicily.

A groove metal act from the Far Eastern Russian city of Blagoveshchensk on the Chinese border, Mad Cow Disease has been delivering rhythmically charged compositions since 2017. The band brings groove metal to one of Russia's most remote metal outposts.

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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.

Maggoth is a thrash/groove metal band from Pabianice, Poland, formed in 2011. They blend thrash metal's velocity with groove metal's rhythmic punch.