Chief Keef and Metro Boomin have both been busy this year: Keef recently released Bang 3 and Bang 3, Pt. 2, while Metro served as executive producer on Drake and Future's What A Time To Be Alive. But packed schedules didn't stop the producer and the rapper from connecting with Sean Kingston for "Murda Mook." The lumbering bass here channels the same textures as Metro's WATTBA material. Listen below, and read the beatmaker's FADER interview.