Shout Rifle
A shout rifle looks less like a rifle and much more like an elongated megaphone. It functions in much the same way, amplifying sound input, such as the wielder's voice, to an extreme volume and projecting it outward in a wide area. Protest leaders use shout rifles, ensuring that their proclamations can be heard at a great distance. Law enforcement officials also appreciate these weapons for crowd control.
Source
Armory pg. 51
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