The Raikage punch with his left arm to Sasuke surrounding with the Susanoo Amateratsu shiled.
And the black flames reach the lefy arm.
Who do you think is gonna happend.
1.- Lost his left arm
2.- Avoid with Shushin no Jutsu
3.- The arm protectors (weights) act as a shield
3.-The Raikage by himself gonna cut of his left arm
4.- Or with his raiton chakra protector doesn`t reach his arm