The annual NAMM (the National Association of Music Merchants) Show went down over the weekend; for the unfamiliar, it's probably the biggest trade show in the world for musicians and instrument companies. With a ton of artists in Anaheim, Calif., for the event, there was no better time for supergroup Metal Allegiance to get together and play some of your all-time favorites as part of their "Tribute to Fallen Heroes" show.

Our buds over at Loudwire were there to catch all the excitement — the lineup included Testament's Chuck Billy, Anthrax's Charlie Benante, Chris Jericho, Death Angel's Mark Osegueda, Machine Head's Phil Demmel, Slayer's Gary Holt, the Winery Dogs' Billy Sheehan, Motörhead's Mikkey Dee and Halestorm's Arejay Hale, as well as the core members of the band: David Ellefson, Mike Portnoy, Alex Skolnick and Mark Menghi.

Watch the members rip shit up below via the likes of "Seek & Destroy," "Peace Sells," "Iron Fist" and more.