Why doesn't my BodyForce change when I change the value?

I created a projectile out of a gun. This gun is a tool that the player will use. I'm having an issue where this isn't changing the direction of the "bullet" (newPart) when I manually change the value. I'm using a body force.

local bodyForce = Instance.new("BodyForce", newPart)
local forward = Vector3.FromNormalId(Enum.NormalId.Back)
bodyForce.Force = bodyForce.Parent.CFrame:vectorToWorldSpace(forward)

I've tried using Vector3.New but I still couldn't change the direction of the bullet. My guess would be how the builder formed the tools, they are unions named Handles inside a "Tool"