Button wont work after clicking two times in a row, pls help?

So I have a button that gives the user a gun than destroys the one they have in there inventory but if you click the button again within a few seconds the gun will be destroyed and nothing will be in its place. I tried adding a wait but that did nothing, here is the code

local button = script.Parent
local plr = game:GetService('Players').LocalPlayer

local tool = game.ReplicatedStorage.ACS_Engine.HOOD["Micro UZI"] 

button.Activated:Connect(function()
	script.Parent.Parent.Visible = false
	plr.Backpack:FindFirstChildWhichIsA('Tool'):Destroy()
	local clone = tool
	clone.Parent = plr.Backpack
	wait(0.5)
	script.Parent.Parent.Parent.ClassH.Visible = true
	wait(3)
	script.Parent.Parent.Parent.ClassH.Visible = false
end)

Thanks!

Try This:

local button = script.Parent
local plr = game:GetService('Players').LocalPlayer
local tool = game.ReplicatedStorage.ACS_Engine.HOOD["Micro UZI"]:Clone()

button.Activated:Connect(function()
script.Parent.Parent.Visible = false
plr.Backpack:FindFirstChildWhichIsA('Tool'):Destroy()
tool.Parent = plr.Backpack
 wait(0.5)
script.Parent.Parent.Parent.ClassH.Visible = true
wait(3)
script.Parent.Parent.Parent.ClassH.Visible = false
end)

local button = script.Parent
local plr = game:GetService('Players').LocalPlayer
local tool = game.ReplicatedStorage.ACS_Engine.HOOD['Micro UZI']
local cooldown = false --//r

button.Activated:Connect(function()
    if cooldown == false then --//r
        cooldown = true --//r
        script.Parent.Parent.Visible = false
        plr.Backpack:FindFirstChildWhichIsA('Tool'):Destroy()
        local clone = tool:Clone() --// You forgot the :Clone()
        clone.Parent = plr.Backpack
        wait(0.5)
        script.Parent.Parent.Parent.ClassH.Visible = true
        wait(3)
        script.Parent.Parent.Parent.ClassH.Visible = false
        cooldown = false --//r
    end --//r
end)

You forgot to actually clone the tool. You were just grabbing the tool from replicated storage and placing it into the players backpack without making a copy.

I also added a cooldown, if you dont want it just remove the things labeled --//r