Raycasting from a zombie forward?

Im trying to make a beam raycast from the zombies torso forward. The problem is it is bent and not perpendicular to the torso and when the zombie moves towards me it generates a new beam on a similar rotation. I have figured out the all the beams are pointing towards the centre of the map(0,0,0)

function raycast()
    local ray = Ray.new(
        (script.Parent.Torso.CFrame).p ,
        (script.Parent.Torso.CFrame.lookVector * 5)
    )
    local part, position = workspace:FindPartOnRay(ray, nil, false, true)

    local beam = Instance.new("Part", workspace)

    beam.BrickColor = BrickColor.new("Bright red")
    beam.FormFactor = "Custom"
    beam.Material = "Neon"
    beam.Transparency = 0.25
    beam.Anchored = true
    beam.Locked = true
    beam.CanCollide = false

    local distance = 5
    beam.Size = Vector3.new(0.3, 0.3, distance)
    beam.CFrame = CFrame.new(script.Parent.Torso.Position, script.Parent.Torso.CFrame.lookVector ) * CFrame.new(0, 0, 2.5)
end


while true do
    wait(1)
    raycast()
end