Also in "Zeus," Machine Gun Kelly gets an early mention as Eminem ponders someone who believes MGK came out on top in their infamous public feud:

"Fair weather, wishy-washy
She thinks Machine washed me
Swear to God, man, her favorite rapper wish he’d crossed me"

And on "Gnat," the official video for which can be found below, Em seemingly references MGK in the chorus:

"They come at me with machine guns
Like trying to fight off a gnat"