B3 ultra battle droid

The B3 ultra battle droid was a powerful prototype battle droid designed by the Confederacy of Independent Systems and deployed approximately five months after the Battle of Geonosis.

Characteristic
The B3 ultra battle droid was based on the B2 super battle droid model, though it was far larger and bulkier than the B2. The B3 had two large arms fitted with a flamethrower and a wide-spray plasma cannon. Two smaller arms, located underneath the primary limbs, featured deadly rapid-fire blasters, similar to the B2 battle droid.

In addition, the ultra droid had a magazine of brilliant missiles located to the left of its large, neckless head. The B3 also had a density projector to increase its weight, keeping it from falling over in combat

Remarks
"Holy Hell! That’s the largest battle droid I have ever seen!" - CT-7823