Loudwire: Interview: Kirk Hammett Explains Why His Solo EP Couldn’t Have Happened Until Now

Metallica lead guitarist Kirk Hammett's solo EP Portals, a cinematic journey of expansive instrumental music out in time for this year's Record Store Day (April 23), is already a historic Metallica item. Not only is it the musician's debut solo effort and the first-ever solo project from any Metallica member while actively in the influential heavy metal band, but it probably wouldn't have come together at all until now.

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