Attempt to call index upvalue 'handle' (a nil value)?

So, I am making a gun for my game but when I use it I get an error saying

Attempt to call index upvalue 'handle' (a nil value) on line 3

Here is the code:

local tool = script.Parent

local handle = tool:FindFirstChild("Handle")
local hole = tool:FindFirstChild("Hole")

local replicatedStorage = game:GetService("ReplicatedStorage")
local players = game:GetService("Players")

local player = players.LocalPlayer

local equipEvent = replicatedStorage:WaitForChild("EquipEvent")
local reloadEvent = replicatedStorage:WaitForChild("ReloadEvent")
local shootEvent = replicatedStorage:WaitForChild("ShootEvent")
local unequipEvent = replicatedStorage:WaitForChild("UnequipEvent")

local settings = tool:WaitForChild("Settings")

local bullets = settings:WaitForChild("Bullets")

local bullets = settings:WaitForChild("Bullets")
local cooldown = settings:WaitForChild("Cooldown")
local damage = settings:WaitForChild("Damage")
local maxBullets = settings:WaitForChild("MaxBullets")
local reloadTime = settings:WaitForChild("ReloadTime")

local debounce = false

tool.Equipped:connect(function(mouse)
    equipEvent:FireServer(handle.EquipAnimation)

    mouse.Button1Down:connect(function()
        if debounce == false then
            debounce = true
            if bullets.Value == 0 then
                reloadEvent:FireServer(bullets, maxBullets, reloadTime, handle.ReloadAnimation)

                wait(reloadTime.Value)

                debounce = false
            else
                local ray = Ray.new(hole.CFrame.p, (mouse.Hit.p - hole.CFrame.p).unit * 300)
                local part, position = workspace:FindPartOnRay(ray, player.Character, false, true)

                shootEvent:FireServer(part, position, hole, bullets, damage)

                wait(cooldown.Value)

                debounce = false
            end
        end
    end)

    tool.Unequipped:Connect(function()
        unequipEvent:FireServer()
    end)
end)