Mastercastle is a female-fronted neoclassical heavy metal band from Genoa, Italy, featuring vocalist Giorgia Gueglio and guitarist Pier Gonella. Their seventh album 'Lighthouse Pathetic' (2022) delivers eleven tracks of melodic, technically proficient heavy metal blending power with neoclassical composition.

Masterstroke is a heavy metal band from Tampere, one of Finland's most prolific metal cities, delivering melodic yet powerful compositions since their formation. The band channels the melodic sensibilities of Finnish metal into a traditional heavy metal framework.

Matanuska is a heavy and groove metal act from the Scottish city of Aberdeen, delivering thick, riff-heavy compositions since 2014. The band brings a muscular groove metal approach to Scotland's granite city.

Material Vibe is a heavy, power, and thrash metal band from Athens, Greece, formed in 2016. They blend multiple metal styles into a versatile, aggressive sound.

A heavy metal and hard rock act from Rome, Mausen has been delivering riff-driven compositions since 2014. The band contributes to the Italian capital's extensive traditional metal and rock scene.

Mauser fires off thrash and heavy metal from the Andalusian town of Morón de la Frontera, blending Teutonic-style riffing with the raw energy of Spanish underground metal. Active since 2019, the band channels their namesake firearm's precision into tight, aggressive compositions.

Mausoleum were a heavy/thrash metal band from Waidhofen an der Ybbs in Lower Austria, active from 1993 until splitting up in the late 1990s. The band worked independently and had a full-length album planned for autumn 1997, though it was never completed. Their brief run placed them among a generation of rural Lower Austrian bands working within the European thrash and heavy metal tradition.

Mausoleum Gate is a heavy metal band from Kuopio, Finland, active since 2008, crafting cult heavy metal inspired by obscure 80s gems with mystical atmosphere. Their catalog from 2014's self-titled debut through 2025's Space, Rituals and Magick blends occult seventies rock with NWOBHM, drawing comparisons to Angel Witch and Magnum.

Mausolée is a heavy and doom metal band from Paris, France, formed in 2024. Their French name meaning "mausoleum" captures the sepulchral weight of their heavy doom compositions.