Powerful opening salvo from Killer Mike and El-P’s forthcoming R.A.P. Music (Rebellious African People’s Music) project on Adult Swim’s Williams Street Records label. “Big Beast” features a pretty serious line-up of vocal guests alongside the ATL rhyme vet, and even more serious beat-work via El Producto, who earlier today described the tune’s sonic composition via The Twitter: “no samples in big beast. just an homage to that classic bomb squad synth shit.” Well, daaayum then because that little “Public Enemy No. 1″/”Blow Your Head” type synth thing is a remarkably convincing facsimile. Bravo! Listen below, or buy it via iTunes .