The AV-7 Antivehicle Cannon, also known as the AV-7 Mobile Cannon, the Republic Artillery Gun, the heavy cannon, or the Clone Artillery Cannon, was a self-propelled artillery unit used by the Galactic Republic during the Clone Wars.
The vehicle could be operated by one clone tank gunner in a seat on the side of the gun, and had a chamber for refilling plasma shells to the side of the lower chassis.
The vehicle would be moved with its built in repulsorlifts until it reached a suitable firing position and then entrench itself on the ground, using four metallic feet for support.
Its artillery shells created a fairly large blast radius, able to take out both vehicles and surrounding droids in a single shot.
These cannons were also used on Geonosis in the Second Battle of Geonosis when Anakin Skywalker and Ahsoka Tano were attempting to infiltrate a Separatist droid factory. Many of these cannons were destroyed by the Separatist experimental super tanks.
In 2011, Hasbro produced a Clone Wars edition of the vehicle, the Republic AV-7 Mobile Cannon. The action vehicle was built to accommodate the company's 3-3/4" action figure line of Star Wars figures. The vehicle featured a caterpillar-like tread assembly on the underside, in contrast to the in-universe units demonstrating motion via repulsorlifts.[3]