Mustang is a heavy metal and hard rock band from Athens, Greece, active since 2009. They channel classic heavy metal energy from the Greek capital.

A French black metal project, MustardGaz has been crafting chemical-warfare-themed compositions since 2017. The project channels the horror of poison gas warfare into noxious, atmospheric black metal.

Mustasuo is a black metal and crust band from Oulu, Finland, formed in 2016. Their name meaning "Black Swamp" captures their blend of black metal's darkness with crust punk's raw urgency.

An atmospheric sludge and post-metal band from Aarschot, Flemish Brabant, Belgium, active from 2006 to 2015 and revived in 2020, signed to Funtime Records. Their catalog includes the seven-track 'Ebb & Flow' (2013), compared favorably to Cult of Luna for its intense narrative arc, and the recording 'Set the Woods on Fire / Catharsis' (2020), which incorporated guest vocal arrangements by Belgian composer Déhà.

Mustum is a doom metal duo from Baden-Württemberg, Germany, formed in 2019. Their debut At The Expense Of Others delivers seven tracks of crushing Swabian doom, blending German and English lyrics across nearly 50 minutes of heavy, deliberate compositions.

Hailing from Herten in the Ruhr area, Musty Guts pairs death and thrash metal with a visceral, old-school approach to extremity. Active since 2018, the band channels the industrial heritage of their surroundings into grinding, aggressive compositions.

Mutagenic Host is a death metal band from London, England, formed in 2023. They channel mutated death metal from the UK capital.

Mutagenocide is a power, groove, and thrash metal band from Oxford, England, formed in 2012. They blend power metal's energy with groove and thrash metal's aggression.

Mutalith is a progressive black metal band from Dundee, Scotland, formed in 2024. They push black metal into progressive territory from the Scottish east coast.