Martyred

Black Death - USA

Martyrs Melancholy

Death Doom - USA

Martyrvore

Death Black - USA

Maruta

Grind Death - USA

Mary Cries Red

Thrash Death - USA

Mary Magdalan

Metal - USA

Mary Shaw

Melodic Death - USA

Mary Shelley

Black Metal - USA

Marya Roxx

Heavy Metal - USA

Masada (USA-1)

Technical Death - USA

Masada (USA-2)

Bay Area Thrash - USA

Masakari

Crust - USA

Maserati

Heavy Rock - USA

Mashiba

Thrash Metal - USA

Masked Jackal

Thrash Metal - USA

Maskim (USA)

Black Metal - USA

Masnema

Deathcore Thrash - USA

Masochism

Technical Death - USA

Masochist (USA-1)

Black Death - USA

Masochist (USA-2)

Thrash Metal - USA

Masochist (USA-3)

Death Metal - USA

Masque (USA)

Hard Rock - USA

Masqued

Symphonic Metal - USA

Masquerade (USA)

Hard Rock - USA

Masquerade Of Shadows

Symphonic Metal - USA

Mass (USA)

Heavy Metal - USA

Mass Casualty

Death Metal - USA

Mass Mental

Fusion - USA

Mass Murder Frenzy

Death Metal - USA

Mass Murder Messiah (USA)

Brutal Death - USA

Mass Murder Phenomena

Death Metal - USA

Mass Of Virtue

Progressive Metal - USA

Mass Produced Human

Grindcore - USA

Mass Psychosis

Death Metal - USA

Massacaust

Thrash Metal - USA

Massacre (USA)

Death Metal - USA

Massacre Of The Umbilical Cord

Deathcore - USA

Massive Repulsive

Deathcore - USA

Massive Retaliation

Black Death - USA

Mast

Sludge Metal - USA

Mastedon

Hard FM - USA

Master (USA)

Death Metal - USA

Master Fister

Power Metal - USA

Master Fury

Thrash Metal - USA

Master Sword

Power Metal - USA

Masterguru

Death Grind - USA

Masterlast

Industrial Metal - USA

Mastermind (USA)

Progressive Metal - USA

Masters Of Luxury

Sludge Metal - USA

Masters Of Metal

Thrash Speed - USA

Masters Of Reality

Stoner - USA

Mastery (USA)

Black Metal - USA

Masticated Excretions

Death Metal - USA

Mastiff (USA-1)

Deathcore - USA

Mastiff (USA-2)

Hardcore - USA

Mastodon

Progressive Metal - USA

Masyia

Black Metal - USA

Mata Hari

Progressive Heavy - USA

Matakopas

Heavy Metal - USA

Matanbuchus

Ambiant Black - USA

Matchless Overthrow

Thrash Death - USA

Materia Prima (USA)

Progressive Black - USA

Matianak

Black Metal - USA

Matrekis

Heavy Metal - USA

Matricide (USA-1)

Death Metal - USA

Matricide (USA-2)

Thrash Metal - USA

Matriphagy

Death Metal - USA

Matrix

Heavy Metal - USA

Matt Harding's Steel Armada

Power Metal - USA

Matt Harnett

Progressive Metal - USA

Matt McCourt

Heavy Metal - USA

Matt Sorum's Fierce Joy

Hard Rock - USA

Matthew Mills

Neo Classical - USA

Matthias

Crossover - USA

Matthias Steele

Power Metal - USA

Matutinum Miserabilis

Melodic Death - USA

Mau

Stoner - USA

Maudlin Of The Well

Progressive Metal - USA

Maugrim

Ambiant Black - USA

Maul

Death Metal - USA

Maulbury Hill

Deathcore - USA

Mauled

Deathcore - USA

Mausoleum (USA)

Death Metal - USA

Mauve Sideshow

Dark Ambient - USA

Maverick Hunter

Melodic Death - USA

Mavradoxa

Atmospheric Black - USA

Maw Of Poseidon

Deathcore - USA

Mawdryn

Funeral Doom - USA

Max Havoc

Heavy Metal - USA

Max Lynx

Heavy Metal - USA

Maximum

Hard Rock - USA

Maximum Oversatan

Speed Metal - USA

Maximus (USA)

Metal - USA

Maxine Petrucci

Hard Rock - USA

Maxmillion

Sludge Doom - USA

Maxx Explosion

Hard FM - USA

Maxx Warrior

Heavy Metal - USA

Maxxx

Heavy Metal - USA

Maxxxwell Carlisle

Guitar Hero - USA

May The Stars Be Mute

Metalcore - USA