The band's first official EP was released in 1987 by the then young record label Radio Trípoli. At the time, the label was co-owned by Chuchu Fassanelli (one of the members of the band), and Walter Kolm (the band's manager). The "Al K.O." EP featured four songs, including a cover of "Chaos" by The 4-Skins. The lineup included Sergio on vocals, Chuchu on drums, El Mariskal on Bass, Tano on guitar, El Gallego on bass and Adrián “Chino” Vera, actually all the guitars were recorded by Juanchi Baleiron on that EP. Vera was later a member of Attaque 77, Conmoción Cerebral, Mal Momento and Katarro Vandáliko. The EP sold out quickly and a second edition was produced in response to the high demand.