AT-IC - All Terrain Ion Cannon
(from Wookiepedia, the Star Wars Wiki)

Production information

Manufacturer	-	Kuat Drive Yards
Model		-	All Terrain Ion Cannon
Class		-	Walker

Technical specifications

Length		-	26 meters
Height		-	23 meters
Maximum speed	-	60 km/h
Armament	-	* Light blasters (2)
			* Twin laser cannon (1)
			* Heavy ion cannon (1) 
Crew		-	* Pilot (2)
		-	* Gunner (2-3) 
Usage

Role(s)		-	Self-propelled artillery
Era(s)		-	Rebellion era
Affiliation	-	Galactic Empire


The All Terrain Ion Cannon (AT-IC) was an unusual Imperial walker design similar to the 
AT-AT, but with all its cargo space dedicated to an ion cannon and its support systems.

Behind the scenes

The AT-IC originated in a toy concept that Kenner presented to Lucasfilm in the mid-1980s, 
as part of a post-Return of the Jedi line expansion that was eventually abandoned.

The item consisted of a recycled AT-AT toy, with parts of its back removed and replaced 
with a laser cannon from a Death Star toy set. The presentation binder stated the AT-IC 
is "used exclusively for mobile defense of strategic Imperial locations".

Sources

* The New Essential Guide to Weapons and Technology 
* Star Wars Is Forever: A Look Inside Kenner's Star Wars Plans for 1985 & 1986
  (http://theswca.com/images-speci/85LineExt/index.html)