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A dreadnought [[power fist]] may come in a variety of forms but all accomplish the same task. The most common form of the power fist is the four-fingered '''Mk V''' version. Another type is the increasingly rare '''Mk IV''' power fist which, although roughly shaped like the '''Mk V''', has bladed fingers which easily distinguishes the '''Mk IV''' from the its successor.{{cite thisCite Marker End}}

A final and incredibly treasured form of the power fist is the hand attachment found on a few [[Venerable Dreadnought]]s. The hand attachment is the most easily recognizable variant as it resembles a human hand. This fist is unique in the fact that it gives the dreadnought occupant an opposable thumb, allowing much more control in the grasping or holding of objects.{{Cite ThisMarker End}}<br>

The [[assault drill]] is one of the most formidable close combat weapons that a dreadnought can wield; however, this attachment is unique in the fact that it is a siege weapon and is only operable on [[Dreadnought|Assault]] and [[Siege Dreadnought]]s. The assault drill consists of three drill cogs that easily grind through rock, steel, and ceramite. This drill is used exclusively for use against heavily armoured targets such as pillboxes, bunkers, and even tanks. The assault drill is also unique in the fact that is sports an internal [[heavy flamer]] that allows the dreadnought to send a jet of flame into any object pierced by its drill. This comes in handy when dealing with buildings or APC's packed with unarmoured infantry.{{Cite ThisMarker End}}

The [[Seismic Hammer]] is a much more common siege weapon than the Assault Drill, due to the simple fact that is a much less complex weapon. Where an Assault Drill is designed to penetrate its targets, the Seismic Hammer batters them into pieces. It is also equipped with an under-slung [[multi-melta]]. This siege weapon is only compatible with the [[Ironclad Dreadnought]] chassis.{{Cite ThisMarker End}}

The [[Chainfist]] close combat weapon is another attachment unique to the [[Ironclad Dreadnought]]. This arm consists of a massive chainsaw shaped to fit a dreadnought power fist. This is a devastating weapon capable of tearing apart infantry and light armour.{{Cite ThisMarker End}}

Though rare and elusive, the Grey Knights do field a few [[Grey Knights Dreadnought|dreadnought]]s. These dreadnoughts are honoured members of their units and are armed with the best weapons available. One such weapon is a massive [[Nemesis Force Weapon]] that consists of a gargantuan blade dancing with psi-matrix energies. This weapon is particularly devastating to [[daemons]].{{Cite ThisMarker End}}

A Chaos power fist is almost identical to its loyalist counterpart, though they do not follow a consistent pattern, often claw- or talon-shaped in their design.{{Cite ThisMarker End}}

Chaos [[Chainfist]]s are a valued dreadnought weapon, not only because of their effectiveness, but because their brutal blood-grinding method of destruction is popular with dreadnoughts dedicated to [[Khorne]]. It is not uncommon to see a [[World Eaters]] or other Khornate dreadnought equipped with dual Chainfists.{{Cite ThisMarker End}}