How to make a game pass give you custom gear/model?

How to make a game pass give you custom gear/model because I want to make a first person shooter game 3:

Add the gun/model you want to give the player somewhere, I suggest serverstorage And use this code, ofc you have to edit it and such

local id = 000000--Edit this to your gamepass ID
local item = game.ServerStorage.Item--Edit this
 
game.Players.PlayerAdded:connect(function(player)
    if Game:GetService("GamePassService"):PlayerHasPass(player, id) then 
        local a = item:Clone()
	a.Parent = player.Backpack
    else
        print(player.Name .. " doesn't have the game pass...")
    end
end)

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