And recall: these robots are troops as well, hence they can be taken lots of times in an army (but they don't score as they're classed as support units).
There are some amazing stats associated with this unit, not least the T=7 characteristic. The Heresy quashed that in short order though. So much so, that some in the Imperium saw them as a sleeping threat should Mars ever decide to break away from the deal struck with the Emperor.
These robots have long featured at the forefront of the Mechanicum's armies.
