Help on how to make a gun with RayCasting FE?

Hi! I made a Laser Gun using Roblox's Tutorial and I want to make it FE compatible. Any help on how I would go about it? Local Script:

local tool = script.Parent
local player = game:GetService("Players").LocalPlayer
local mouse = player:GetMouse()
local canPlay = true
local mouseDown = false
Equipped = false
tool.Equipped:Connect(function()
    Equipped = true
    mouse.Button1Down:Connect(function()
        mouseDown = true
    end)
    mouse.Button1Up:Connect(function()
        mouseDown = false
    end)
    while true do
        if mouseDown then
            if canPlay and Equipped then
                canPlay = false
                local ray = Ray.new(tool.Handle.CFrame.p, (mouse.Hit.p - tool.Handle.CFrame.p).unit * 100)
                local part, position = workspace:FindPartOnRay(ray, player.Character, false, true)
                local beam = Instance.new("Part", workspace)
                beam.BrickColor = BrickColor.new("Toothpaste")
                beam.FormFactor = "Custom"
                beam.Material = "Neon"
                beam.Transparency = 0.6
                beam.Anchored = true
                beam.Locked = true
                beam.CanCollide = false
                local distance = (tool.Handle.CFrame.p - position).magnitude
                beam.Size = Vector3.new(0.3, 0.3, distance)
                beam.CFrame = CFrame.new(tool.Handle.CFrame.p, position) * CFrame.new(0, 0, -distance / 2)
                game:GetService("Debris"):AddItem(beam, .01)
                if part then
                    local humanoid = part.Parent:FindFirstChild("Humanoid")
                    if not humanoid then
                        humanoid = part.Parent.Parent:FindFirstChild("Humanoid")
                    end
                    if humanoid then
                        humanoid:TakeDamage(5)
                    end
                 end
                 canPlay = true
              end
          end
          wait(.1)
    end
end)
tool.Unequipped:Connect(function()
    Equipped = false
end)