On August 12, 1991, METALLICA detonated the biggest shift in their career with their self-titled fifth album, forever known as "The Black Album." Gone were the sprawling, riff-stacked epics of "...And Justice for All" — in their place came leaner, heavier, radio-ready anthems like "Enter Sandman," "Sad But True," and "Nothing Else Matters." Produced by Bob Rock, the record polarized thrash purists but rewrote the rules of what a metal band could achieve commercially, eventually selling over 16 million copies in the US alone and topping charts worldwide. It turned METALLICA from underground thrash icons into arena-filling superstars, a transformation that still divides fans decades later. Love it or resent it for "selling out," there's no denying "The Black Album" is one of the most consequential heavy metal records ever pressed to vinyl — the record that brought metal to the masses.