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9491 Geonosian Cannon is a Star Wars: The Clone Wars set released in 2012. The set includes Commander Gree, a Clone Wars variant of Barriss Offee, a Geonosian Zombie, a Geonosian Warrior, and a Geonosian Cannon.
The main part of the set is the large cannon manned by the Geonosian Warrior. It is mainly comprised of brown, dark tan and grey bricks. It has a control platform on the rear of the cannon which can tilt up and down on Technic pins and has flick-fire missiles underneath the cannon. These are fired from the back of the cannon using a handle system. The cannon sits on two stabilisers, one on either side of the cannon. The barrel itself is made of several brown dishes with a long tip at the front. All of the minifigures are new or redesigned. Barriss Offee and the Geonosian Warrior have been redesigned, and the Geonosian Zombie is new as well as being, so far, exclusive to this set.
The powerful Geonosian Cannon, or LR1K Sonic Cannon, began being mass-produced for use by the armies of Geonosis after Archduke Poggle the Lesser allied Geonosis with the Confederacy of Independent Systems (CIS, or Separatists). It first saw use in the First Battle of Geonosis, that was seen in Star Wars Episode II: Attack of the Clones, when the Clone Army of the Republic was first revealed, and in the subsequent Clone Wars, where it was depicted in the Star Wars: The Clone Wars animated series during the Second Battle of Geonosis, and what this set is based on.
- This is the second version of the LR1K cannon, the first being introduced in 4478 Geonosian Fighter in 2003.
- Barriss Offee appears with a the same cape model used for Jawas.