
As a result, Leman Russ Executioners are a rare sight in other Imperial armoured regiments, and are usually deployed with great care by their commanders frequently behind the main battlelines which often consist of more common Leman Russ tank variants. The Skitarii regiments of Ryza are equipped almost entirely with Executioners, yet the Skitarii of other Forge Worlds and the massed regiments of the Imperial Guard are left with only a few Executioners of their own.

Ryza is renowned throughout the Adeptus Mechanicus for its devout worship of the ancient and mystical arts of the plasma reactor and magnetic containment field construction. In the 41st Millennium the only Forge World in the entire Imperium still capable of building the Plasma Destroyer weapon used by the Executioner is Ryza. Over the thousands of years since end of the Horus Heresy the Adeptus Mechanicus has slowly lost the ability to produce high-quality Plasma Weapons. Ancient records from the Adeptus Mechanicus archives on Mars show that during the Great Crusade there were entire Imperial Army armoured regiments equipped with nothing but Leman Russ Executioners. The Executioner variant of the standard Leman Russ main battle tank is one of the oldest still in use by the Imperium.

The Leman Russ Executioner is a variant of the Imperial Guard's primary main battle tank, the Leman Russ.

A Leman Russ Executioner unleashes its Plasma Destroyer
