Sentinels, or Droideka Sentinels as they are also known, represented a more sophisticated version of the droideka. Smugglers altered them to safeguard illicit goods. Similar to the original model, the Sentinel carried a pair of blaster cannons; however, enhancements made in battle resulted in superior offensive capabilities. In the course of the Galactic Civil War, both the forces of the Galactic Empire and the Rebel Alliance employed these droids as a type of security droid. Both the Empire and the rebels could position a Sentinel on a Droideka Platform, effectively transforming it into a stationary turret.