1. local lp = game.Players.LocalPlayer.Character

  2. local Weapon = "Rifle" -- Your Weapon

  3. lp[Weapon]:GetAttributeChangedSignal("Ammo"):Connect(

  4.     function()

  5.         lp[Weapon]:SetAttribute("Ammo", 9999)

  6.     end

  7. )

  8. lp[Weapon]:SetAttribute("Firerate", 9999)

  9. lp[Weapon]:SetAttribute("BulletSpeed", 9999)

  10. lp[Weapon]:SetAttribute("Spread", 0)