The one-off supergroup GBI — Foo Fighters’ Dave Grohl and Anthrax members Charlie Benante and Scott Ian — have unveiled their cover of the Bad Brains song “The Regulator.”

The trio had previously announced the single as a Record Store Day (April 20th) vinyl release, and on Sunday (April 21st), they unleashed a music video for the track (watch below).

Upon the initial announcement of the single, Scott Ian revealed the story behind the collaboration: “Anthrax were recording our new album at [Grohl’s] 606 [studio] and the Foo’s were there rehearsing at the same time. Dave had popped into the studio to hang and listen to what we were doing and we’d gone over to hear the Foo’s rehearse. I texted Dave the next morning and said: ‘Hey! Good to see ya the other day. Are you rehearsing today? I’ll be there doing guitars. Wanna record a Minor Threat song? Bad Brains?’ He replied immediately with the Spotify link for ‘The Regulator.’ I said I’d be there at 12:30pm and he said, ‘See you at 1.’ It was that simple.”

He continued, “We recorded at 606. Charlie and I asked Dave if he’d play drums and sing as well, he was in. Charlie plays bass and I’m on guitar. Charlie did the badass art for the cover. GBI!”

Proceeds from the single benefit legendary Bad Brains singer H.R., who is suffering from SUNCT Syndrome, which causes cycles of intense headaches that make it impossible for him to perform.

Anthrax are expected to release a new album at some point this year. In the meantime, they’re playing the Welcome to Rockville and Sonic Temple festivals in May, and will embark on a Latin American jaunt in April and a UK/European tour in November. Pick up tickets to their upcoming shows here.

Grohl, meanwhile, is hitting the road with Foo Fighters on a US summer stadium tour. Tickets to those shows are available here.

Check out the music video for GBI’s cover of Bad Brains’ “The Regulator” below.