Khannas is a southern/groove metal band from San Rafael, Mendoza, Argentina, whose debut release was the EP Lengua de Diablo, issued on January 31, 2016. The four-track EP — containing "Bordeando abismos," "Resiste el olvido," "Memorias latentes," and "Lengua de diablo" — was recorded, mixed, and mastered at Aire Records by Facundo Lucero, with all compositions written by Fernando Ferre.

Killin'Ground is a thrash/groove metal band from Fortaleza, Ceará, Brazil, formed in 2019. Their debut release, The Weight of the Crown (January 2019), showcases a sound rooted in aggressive thrash with groove-oriented rhythms, featuring tracks such as "Another Day in Hell." The band also contributed to the 2022 compilation The Gates of Brazilian Metal Scene, released by MS Metal Records.

Kinoglass is an experimental thrash/groove metal trio from Presidente Prudente, São Paulo, Brazil, formed in 2020, comprising Luis Farrús (bass/vocals), Fernando Volpin (guitars/keyboards), and Guilherme Sala (drums). They released the nine-track album A Man With A Camera in March 2020, followed by Se A Carapuça Servir in February 2024, with both records blending thrash aggression with psychedelic and avant-garde influences rooted in 1970s heavy rock. Their lyrical themes address social criticism, anti-fascism, and personal struggle.

Krossover is a thrash and groove metal band formed in August 2013 in Reconquista, Santa Fe, Argentina. The band contributed the track "Inhumano" to the regional compilation "Paraná Bandas Oficial EP 7" in August 2016, building a following in the northeastern Argentine metal underground. They maintain an active presence on SoundCloud and Bandcamp as an independent act.

Kurcuma is a thrash and groove metal band from Don Bosco, Buenos Aires, formed in 2021. They released two demos in their debut year — "Ojos Rojos" and "Las Puertas" — and followed up with a self-titled EP in August 2022 available on Bandcamp. The band operates as an independent act rooted in the Buenos Aires underground metal scene.

M67 is a groove metal and hardcore band from Manaus, Amazonas, Brazil, founded in 2017 by Naveca Ogro and Gabriel Alladoh and named after the M67 fragmentation grenade. The band draws on Amazonian folklore for lyrical content, explored in their EP "Agouros Amazônicos," which features tracks themed around legends of the Brazilian Amazon including the single "Mapinguari Algoz" (2020).

Mamut is a Buenos Aires thrash and groove metal band featuring vocalist Theo Peltzer, guitarist Facundo Robles, and bassist Gerardo Cei, known for fusing classic and modern metal with Latin American folk rhythms. The band recorded their 2023 album 3 — an eight-track release — at Romaphonic Studios in Buenos Aires in December 2022.

Formed as a supergroup drawing from well-known names in the national underground, Marabô features vocalist Felipe Chehuan (formerly of Confronto and Cabeçudos), guitarist Davi Baeta, bassist Paulinho Coruja, and drummer Henrique Pucci. The band channels heavy groove and metalcore through dense riffs and politically charged lyrics, as heard on the single "Estacas," which was recorded, mixed, and mastered by Baeta and Pucci themselves.

Mate Cosido was a groove metal band from Buenos Aires, Argentina, whose lineup featured vocalist Lito Pared, guitarists Alejandro Venneri and Román Montesi, bassist Gerardo Lucero, and drummer Javier Dorado, who had previously played with Argentine metal legends A.N.I.M.A.L. The band released their self-titled album through EMI in 1996, recorded in June and July of that year and produced alongside Augusto Milharcic. The 12-track record remains their only known release before the band split up.