[SOLVED]How come the Value and Text change for my gun HUD?

I'm trying to change the text when a sound ends, but it won't work. Can somebody please help me solve this problem?

--IMPORTANT I'm using the self, and for some time this seems to have worked but when I try to make sure it changes when a sound plays when the gun fires so it can actually have an accurate reload system.

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--------------------[ CHARACTER LOADING ]---------------------------------------------
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repeat wait() until game.Players.LocalPlayer.Character
repeat wait() until game.Players.LocalPlayer.Character:IsDescendantOf(game.Workspace)
wait(1 / 20)

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--------------------[ CONSTANTS ]-----------------------------------------------------
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local Players = game:GetService("Players")
local TweenService = game:GetService("TweenService")
local ReplicatedStorage = game:GetService("ReplicatedStorage")

local Player = game.Players.LocalPlayer
local PlayerGui = Player.PlayerGui

local CustomHUD = script:WaitForChild("CustomHUD")

local Engine = ReplicatedStorage:WaitForChild("ACS_Engine")
local GunModels = Engine:WaitForChild("GunModels")

local Gun = script.Parent
local Ammo
local StoredAmmo
local AttributeAmmo = Gun:GetAttribute("Ammo")
local AttributeAmmoChanged = Gun:SetAttribute("Ammo")
local Type = Gun:GetAttribute("GunType")

local WeaponInHand, WeaponTool, WeaponData, AnimData

WeaponTool = Gun
WeaponData = require(Gun:WaitForChild("ACS_Settings"))
WeaponInHand = GunModels:WaitForChild(Gun.Name)

Ammo = WeaponData.AmmoInGun
StoredAmmo = WeaponData.StoredAmmo

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--------------------[ TOOL SELECTION AND DESELECTION ]--------------------------------
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function onEquipped()
    print(WeaponData.Ammo)  
    CustomHUD.Frame.GunType.Text = Type
    CustomHUD.Parent = PlayerGui
    if CustomHUD.Frame.Position == UDim2.new(0.7, 0,1.1, 0) then
        wait(.1)
        CustomHUD.Frame:TweenPosition(UDim2.new(0.7, 0,0.794, 0), "Out", .75)
    end
    CustomHUD.Frame.AmmoBase.AmmoBackGround.AmmoAmount.Text = WeaponData.Ammo.."/".. WeaponData.Ammo
    WeaponInHand.Handle.Muzzle.Fire.Ended:Connect(function()
        Ammo = WeaponData.Ammo - 1
        CustomHUD.Frame.AmmoBase.AmmoBackGround.AmmoAmount.Text = WeaponData.AmmoInGun.."/".. WeaponData.Ammo
    end)
end

function onUnequipped(deleteTool)
    if CustomHUD.Parent == PlayerGui then
        CustomHUD.Parent = script
        if CustomHUD.Frame.Position == UDim2.new(0.7, 0,0.794, 0) then
            wait(1)
            CustomHUD.Frame.Position = UDim2.new(0.7, 0,1.1, 0)
        end
    end
end


Gun.Equipped:connect(onEquipped)
Gun.Unequipped:connect(function() onUnequipped(false) end)