A silencer (a.k.a. suppressor) is a device that screws onto the muzzle of a gun barrel, designed to dampen the sound of a shot. There are silencers for handguns, rifles, and shotguns. Hiram Percy ...
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A Supersonic Aircraft with a Silencer
The Quiet SuperSonic Technology aircraft is America's newest experimental plane. A time-lapse video released by NASA in early ...
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