Cframing Player Body parts

Im trying to figure out how to rotate the players arms to point in the same direction as the cameras lookvector so that my projectile can shoot out from the players camera no matter how high theyre looking. (Im using a tool) But when I try to get the Cframe of the arms it gives me an error saying, Cframe is not a valid member of Right Arm, despite the fact that I can look inside the players arm and there is a clear cframe value. How do i get the Cframe of the arms and modify it?

it’s CFrame, not Cframe.
make sure you capitalise everything properly

Ok yeah so you got me there but now when i rotate it 90 degrees my whole body get rotated is there a way i can fix that or is it just the nature of the character being a model?