In 2009, five elementary-aged friends from Erie, Pennsylvania, formed M4 (Mini Men Making Music), under the tutorage of guitar teacher Ryan Krysiak.

Sam Gilman and Krysiak (who had acted as the band’s manager for their entire career) joined as replacements.

[4] In February 2021, Miller, Yost, and Gilman announced they had signed with Velocity Records, as well as Equal Vision Records, to launch an original band named Concrete Castles (while simultaneously still releasing weekly covers as First to Eleven).

[6][7][8] They played their first show on June 5, 2021, at the Atlantic City Beer & Music Festival.

[9] Their debut album, Wish I Missed U, was released on September 17, 2021, with names such as Blake Harnage producing.