Karl Appela better known as Blacko, also known as Afrikaf, Tikaf Lakour, Solitary Lion and Black Renega (born in Montfermeil, Seine-Saint-Denis, France on 5 February 1979) is a French singer and hip hop artist of Réunion origin.

Sniper included Blacko in addition to Tunisiano (Bachir Baccour), Aketo (Ryad Selmi) and initially DJ Boudj.

DJ Boudj left after the initial two albums, Du rire aux larmes (2001) and Gravé dans la roche (2003).

Immediately upon break-off of Sniper in 2007, he was featured in French rapper Soprano's hit "Ferme les yeux et imagine toi".

In 2010, he released his 17 track album Enfant du soleil independently online, explaining his fall-off with Desh Musique and his musical orientation for ragga and reggae.