A-01 Automatons (TDS)

"They are the most dangerous Military Droids in his arsenal, they are his anti-personnel robots. They're specifically designed for search & destroy missions, but they can be also be used as security and infiltration units as well, even we Jedi have trouble facing them."

- Mace Windu on Darth Letalis' Sith Droids.

The A-OR Automatons, sometimes simply known as Automatons, was a Sith Battle droid used by the Early Second Galactic Empire for various purposes and were notable for being one of the most deadly droids in their stockpile having been built through Sith Alchemy.

Details
"So their his version of R2, except filled with the Dark side, designed for combat and mass produced?"

- Anakin expressing the similarities between R2-D2 and the Automatons.

These Droids are described as a cylinder box with Six faces along its sides, its bottom half becomes legs when it activates from its standby mode, the centre of its body between the legs has a round extension that two doors open to reveal powerful Machine-guns that can easily overwhelm a Lightsaber wielded by a Jedi Master something that even Droidekas have proven incapable of doing.

History
The First of these Droids were seen during Stefan and Tial's hunt for Marcus across countless Worlds, believing him to be a Sith Lord and thereby the possible Master of the fallen Darth Maul, between Marcus and these Droids however Tial fell to his injuries and Stefan was tempted by the Dark side.

By the modern day, Marcus has used the Droids alongside his Dark Jedi to attack the Jedi Temple and to guard important ships when he took over the Grand Army of the Republic, murdering Non-Clone Commanders whom refused to turn their backs on the Galactic Republic.

By the time of the Galactic Empire, these Droids became as notorious to the Jedi as the Imperial Knights, killing anything that got in their way and seeking the enemies in which they were to destroy.

Production
It isn't specified how they are produced or why but their production even continued after Marcus' abandonment of the Galactic Republic, it can be assumed that their construction site is thus unknown to the Public. It is even possible that Marcus isn't the one using Sith Alchemy on them, since Marcus has shown to have a number of Dark Jedi on his side, Marcus also isn't noted to follow the old traditional Sith as he sets out to make a newer and stronger Sith Order.

Operation
These Droids were created for the exact purpose of Military use, they could work as little as guards and go all the way up to infiltration or front-line combat, due to their adaptive intelligence and capability to draw on the Force caused even the Jedi to have trouble with them.

Personality and traits
These Droids were described as intelligent and deadly, emotionless and having no concept for Human life, they adapted to any undesirable situations they found themselves in and used a near organic device to detect what their enemies were going to do through the Force with ease.

Appearances

 * Torment to Darkness series