Gun breaks while reloading?

While reloading the gun, it breaks if you shoot for some reason.I need some help with debugging this so please if you can help thanks :)

local tool = script.Parent
local player = game:GetService("Players").LocalPlayer
local debounce = false
local maxammo = script.Parent:WaitForChild("maxammo")
local clipammo = script.Parent:WaitForChild("clipammo")
local reloading = false

function onKeyPress(inputObject, gameProcessedEvent)
    if inputObject.KeyCode == Enum.KeyCode.R then
            if clipammo.Value == 9 then 
                maxammo.value = maxammo.value
                end
        print("reloading")
        reloading = true
        player.PlayerGui.Bullets.TextLabel.Text = "Reloading..."
        maxammo.Value = (maxammo.Value - (9 - clipammo.Value))
        clipammo.Value = 9
        wait(3)
        player.PlayerGui.Bullets.TextLabel.Text = clipammo.Value.." / "..maxammo.Value
        reloading = false
        print("reloading finished")
    end
end

game:GetService("UserInputService").InputBegan:connect(onKeyPress)

tool.Equipped:connect(function(mouse)
    local BulletsGui = script.Parent.Bullets

        BulletsGui:Clone().Parent = player.PlayerGui
        BulletsGui.TextLabel.Text = clipammo.Value.." / "..maxammo.Value
    mouse.Button1Down:connect(function()

    if not debounce then


        debounce = true
if clipammo.Value <= 0 or maxammo.Value <= 0 then end
    if reloading == true then end
    if clipammo.Value > 0 and reloading == false then

        clipammo.Value = clipammo.Value - 1
        player.PlayerGui.Bullets.TextLabel.Text = clipammo.Value.." / "..maxammo.Value

        local ray = Ray.new(tool.Handle.CFrame.p, (mouse.Hit.p - tool.Handle.CFrame.p).unit * 300)
        local part, position = workspace:FindPartOnRay(ray, player.Character, 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 = (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, 0.1)

        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(7)
            end
        end

        wait(0.39)

        debounce = false
    end

tool.Unequipped:Connect(function()
    player.PlayerGui.Bullets:Destroy()
end)
    end
    end)
end)