Metallica's 1991 album debuted at number one on the Billboard 200.
This was the band's first album to reach the top position on the United States album chart. It opened with approximately 598,000 copies sold in its first week and remained at number one for four consecutive weeks.
The achievement was especially notable because Metallica had developed from an underground thrash-metal act into a globally dominant rock band. The album's accessible songwriting, massive production, and carefully chosen singles helped it reach listeners well beyond the band's established metal audience.
The album's long-term chart performance was even more remarkable than its debut. It became one of the best-selling albums of the SoundScan era in the United States and continued appearing on the Billboard 200 for hundreds of weeks. Its chart success is therefore not just a release-week statistic but part of a much larger sales story.