Lychgate

Lye By Mistake

Machetazo

Machine Head

Machinemade God

Mad Rollers

Madder Mortem

MADMADMAD

Madvillain

Maelstrom

Maere

Maestitium

Magazine

Maggot Colony

Magic Pie

Magnet

Magrudergrind

Maim

Major Parkinson

Make Them Suffer

MAL

Malconfort 

Malefice

Malevolent Creation

Malice

Malice In Wonderland

Malignancy

Malignant Altar

Malignant Eternal

Malsain

Man Must Die

Manes

Maniac

Manowar

Mantar

MAQUINA.

Marasmus (US)

Marco Serrato

Marduk

Marginal (Belgium)

Mark Riddick

Marrow

Marrowfields

Mars Mantra

Marty Friedman

Martyr

Maruta

Masks