A self-propelled gun (SPG) is a form of self-propelled artillery, and in modern use is usually used to refer to artillery pieces such as howitzers. Self-propelled guns are mounted on a motorized wheeled or tracked chassis. As such the gun can be maneuvered under its own power as opposed to a towed gun that relies upon a vehicle or other means to b...
Found on
http://en.wikipedia.org/wiki/Self-propelled_gun
(from the article `tank`) Self-propelled guns are field artillery, antitank guns, or antiaircraft guns mounted on and fired from tracked or wheeled vehicles. The vehicles are ... The self-propelled gun is essentially a 100-millimetre to 200-millimetre artillery piece mounted in a turret on a medium or light tracked or wheeled ... [2 ...
Found on
http://www.britannica.com/eb/a-z/s/61
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