BX-series droid commandos, also known as BX-series commando droids or simply commando droids, were advanced battle droids used by the Confederacy of Independent Systems during the Clone Wars. Designed for infiltration and action behind enemy lines, they were also used to perform security, bodyguard and enforcer duties for certain high-ranking Separatists. Ruthless, lethal and adaptive, these droids were the bane of Republic clone troopers and in multiple squads could change the tide of the battlefield. They were able to put even a Jedi on the back foot and were a match for some of the most skilled clones. However, their hefty price tag prevented them from being mass-produced.