Gun Reloading Script Doesn't Works!?

So I have a gun in my game with ammo(6 bullets) but i have a reloading script and it doesnt works

by the way the script is a server side script

Script:

local t = script.Parent
t.Equipped:Connect(function()
local char = t.Parent 
local p = game.Players:GetPlayerFromCharacter(char)
local pgui = p:WaitForChild("PlayerGui")
local ammo = pgui:WaitForChild("Ammo")
local label = ammo:WaitForChild("label")
local reloading = false
local bullets = t:WaitForChild("Bullets")
local userinput = game:GetService("UserInputService")
userinput.InputBegan:Connect(function(input)
    if input.UserInputType == Enum.UserInputType.Keyboard then
        if input.KeyCode == Enum.KeyCode.R then
                if bullets.Value == 0 then
                if not reloading then
                    reloading = true
                    while reloading == true do
                        label.Text = "Reloading..."
                    end
                    wait(2.5)
                    reloading = false
                    bullets.Value = 6
                    end
                end
            end
        end
    end)
end)

I've never scripted a gun before so it might be bad.