This is the Super Battledroid unit. It was made by the Geonosians, and was used during the Battle of Geonosis during Episode II. It's weapon is built into it's arm, and it does not have a head or a neck, which was of course the weakest part of the previous Battledroid.
Hm,, the image got smushed.
Hm,, the image got smushed.