B-4 Mega Battle Droids were the cutting edge of droids. They were fully made of Phrik Alloy and had a many weapons such as retractable, shoulder mounted lasers, flamethrowers, in-built blasters, plasma cannons, missiles, machine guns and grenade launchers. Like Magnaguards, Mega Battle Droids had two processors: one in the chest and one in the head. Only 1000 were made but were very effective. However, they were introduced late in the war, and had no major effect.