I'm not much of a weapons connoisseur so I don't know really what's out there, but it's striking to me that the alternatives you mention are even older than the

I'm not much of a weapons connoisseur so I don't know really what's out there, but it's striking to me that the alternatives you mention are even older than the gun which as far as I know is pretty ancient. Are there any non-lethal long-range suppression technologies? Maybe smoke grenade launchers?