The Psycannon is a weapon exclusively used by the agents of the Ordo Malleus of the Inquisition and its Chamber Militant, the Grey Knights Chapter of Space Marines. There are a few notable exceptions to this general rule, such as the Inquisitor Gideon Ravenor of the Ordo Xenos, whose armoured grav chair was fitted with a pair of such weapons. The Psycannon is generally wielded with both hands by the Grey Knights who are assisted in making use of it through the efforts of their Power Armour. It is used with two hands by most other operators as well, although members of the Grey Knights' Terminator Squads mount the Psycannons on their arm instead. The method of feeding ammunition is similar to that of the Heavy Bolter used by the Space Marines, which uses an ammunition belt running from the