Mabus
                 Macabre
                 Macaroni
                 Machine Head
                 Machinemade God
                 Mactation
                 Madball
                 Madder Mortem
                 Maelstrom
                 Magica
                 Magna-Fi
                 Magrudergrind
                 Magwi
                 Mahavatar
                 Majestic East
                 Makam
                 Malebolgia
                 Maledictive Pigs
                 Malevolent Creation
                 Malignant Monster
                 Malmsteen, Yngwie
                 Man Man
                 Mandatory
                 Manes
                 Manggas
                 Maniak
                 Manifest
                 Manngard
                 Manntis
                 Manowar
                 Mantak
                 Mantic Ritual
                 Marc Rizzo
                 Mardo
                 Marduk
                 Marilyn Manson
                 Maroon
                 Martriden
                 Martyr
                 Martyr AD
                 Martyrdod
                 Martyrdom
                 Masacre
                 Mass, The
                 Massemord
                 Masterplan
                 Mastic Scum
                 Mastodon
                 Matchbox Romance
                 Matricide
                 Mausoleum
                 Maya
                 Mayday Parade
                 Mayhem
                 Maylene and the Sons of Disaster
                 Maze Of Torment
                 Means
                 Measles Mumps Rubella
                 Medication
                 Megadeth
                 Megaherz
                 Mehida
                 Meldrum
                 Melechesh
                 Meliah Rage
                 Melt Banana
                 Memfis
                 Memorized Dreams
                 Menchen
                 Mendeed
                 Mennen
                 Mental Horror
                 Merauder
                 Mercenary
                 Mercury Switch
                 Mercy Fall
                 Mercyful Fate
                 Merrimack
                 Meshuggah
                 Messiah
                 Mest
                 Metakix
                 Metal Church
                 Metalium
                 Metallica
                 Method Of Destruction
                 Methods Of Mayhem
                 Meza Virs
                 MG-34
                 Michael Angelo Batio
                 Mid Autumn Nights
                 Mid-Evil
                 Middian
                 Midgard
                 Midnight
                 Millencolin
                 Millennium
                 Mind-A-Stray
                 Mindfield
                 Mindgrinder
                 Mindless Self Indulgence
                 Mindscape
                 Ministry
                 Minor Times, the
                 Minsk
                 Minus
                 Minus Life
                 Mirage
                 Misanthropy Legion
                 Misery Index
                 Misery Signals
                 Misfits
                 Mistik
                 Mistress
                 Mithras
                 Mizraab
                 Mnemic
                 Modern Life Is War
                 Moker
                 Moksha
                 Mondo Generator
                 Mongrel
                 Monolithe
                 Moonshine
                 Moonsorrow
                 Moonspell
                 Morbid Angel
                 Morbifik
                 Morbius
                 Mord
                 Morgan
                 Morgoth
                 Morgul
                 Morior Ergo Sum
                 Mork Gryning
                 Morranaphab
                 Mors Principium Est
                 Mortal Grudge
                 Mortician
                 Mortification
                 Mortiis
                 Moss
                 Most Precious Blood
                 Motör Militia
                 Motley Crue
                 Motograter
                 Motorhead
                 Mouth of the Architect
                 Mower
                 Mr. Bungle
                 Mr. Plow
                 Mudder
                 Mudvayne
                 Mugg
                 Municipal Waste
                 Murderdolls
                 Murdered, the
                 Mushroomhead
                 Mutiny Within
                 MVM
                 My Bitter End
                 My Darkest Hate
                 My Dying Bride
                 My Ruin
                 My Shining One
                 MyChildren MyBride
                 MyMe
                 Myndsnare
                 Mynis
                 Myotonia
                 Myproof
                 Myrkskog
                 Mystic Forest
                 Mystic Prophecy