Machine Gun Kelly Brutally Disses Eminem.. - Now, yesterday Machine Gun Kelly released a diss track aimed at Eminem titled ''Rap Devil''.. The level of disrespect MGK had towards Eminem is really scary, and he definitely didn't hold back on this one. That's what I talk about. br br In this video I talk about Machine Gun Kelly's Eminem diss track ''Rap Devil''. br br Follow me on Twitter - br br Follow me on Instagram - br br Instrumentals in the background made by ORIGAMI.