B5 missile droid

The B5 Missile droid was a heavy artillery-mech which was designed by the Trade Federation as a miniture Hail-fire droid with legs so instead or having wrist-blasters they were equipped with a wrist-rocket so it could cause more damage quicker, far more faster than the assault droid but more manoeurable than the Hail-fire,so that Battle droid was put into mass production but had a fatal fault as in the shoulders the connections were weak so a perfectly aimed blaster-bolt would disable the droid entirely