The electroleech capacitors are the power-cells woven through a Fulgurite's electroleech stave — the charged reservoir that catches the life torn from a struck enemy and channels it back into the wielder. They are not a device strapped on separately but part of the stave itself: the source of the healing arc that lets the zealot mend as it kills.
The galvanic regeneration-coils are the Cult's repair-augment — banks of blessed conductor wound around a construct's frame that drink deep when a priest works his Rite upon it. When a construct is repaired by a Rite of Repair during a round, the coils restore one additional Wound, drawing more from every welding than the priest's hands alone could give.
The Kastelan protocol-core is the robot's switchable doctrine engine — the machine-soul programming its Datasmith re-sets each round. Under the Aegis Protocol the robot hardens to defence, gaining +1 to its save and the readiness to loose an overwatch reaction shot; under the Conqueror Protocol it turns aggressive, gaining +1 Attack and the ability to advance and fire. The Datasmith flips between the two by remote rite, matching the robot's stance to the moment.
A bionic leg, hammered and calibrated to carry the fighter as surely as the original ever did. It cancels a Hobbled Lasting Injury, restoring a crippled fighter's stride. A servant of the Machine God does not limp for long; the broken part is cut away and a better one bolted on in its place.
An augmetic limb or bionic eye — the commonest surgery in a cult where every body is already part-machine. Fitted to a fighter, it cancels a Hand or Eye Lasting Injury, the ruined flesh simply cut away and replaced with steel. What would cripple another soldier is, to the Mechanicus, a morning's work at the bench.
An auspex scanner, or the heavier omnispex the Skitarii carry — a machine-eye that pierces concealment. It negates an enemy's hidden setup and can mark a target for the maniple's guns, stripping away cover the foe thought secure. Precision fire is only as good as the target it can find, and the auspex finds them.
The armoured shell of the Kastelan Robot — a super-Brute's worth of thick, spirit-warded plating. It is the toughest protection any Machine God body carries, made to shrug off fire that would gut a lesser frame. The hull is the Kastelan chassis itself, inseparable from the war-engine it encloses.
A cortex controller — a data-tether that relays the liturgy of the Machine God further than one voice could carry. It extends the range at which the Canticle, and among the Skitarii the Doctrina Imperative, reaches the maniple's fighters, spreading the priest's declared stance across a wider stretch of the field.
The control-uplink of a Cybernetica Datasmith — a data-tether binding the Datasmith to the Kastelan Robots it commands, issuing their protocols and mending their frames. The uplink is what makes a Datasmith what it is; without it there is no shepherd for the great robots, only unguided engines lurching where they will.
A crackling electrostatic field, borne by Corpuscarii Electro-Priests. Like the Dominus's refractor, it grants a 5+ invulnerable save, turning attacks aside regardless of Armour Penetration. On the frenzied cyber-zealot it doubles as a halo of discharge — the fervour of the Omnissiah made visible in arcing light.
Slabs of blessed ceramite and industrial plate, the armour of Tech-Priests and Kataphron war-engines. It grants a 4+ save — the heaviest worn protection in the maniple. The plating is part of those chassis rather than a separate fitting; a fighter is either built around it or is not.
An incense-cloud projector, venting a thick sacred smoke in the manner of the Shroudpsalm. Once per round it throws up a screen of billowing haze that grants the fighter partial cover, the consecrated fog turning aim aside. A small, portable echo of the static-shroud the whole maniple fights beneath when the Canticle is sung.
Simple mechanicus robes woven over a sensor-mesh, worn by Servitors and the lowest cult-drudges. They grant a 6+ save — scant protection, but enough to turn a glancing hit. The wearer is no armoured warrior; the plain cloth marks a body the maniple can afford to lose and quickly replace.
Magna-cannon stabilisers — bracing struts and gyroscopic mounts fitted to a heavy-weapon carrier such as a Kataphron. They let the fighter fire a heavy weapon as though it did not have the Unwieldy trait, the recoil soaked into the machine rather than the shooter. A braced gun is a gun that hits.
A cluster of mechadendrites — serpentine mechanical limbs sprouting from a Tech-Priest's back, tipped with tools, sensors, and lashing weapon-heads. They lend the priest extra reach in both work and war, a nest of steel arms that never tire, as ready to seize a wounded servo as to strike down a foe drawn too near.
A photo-visor, its preysight lenses drinking in light no eye could use. After this fighter has made an Aim action, it may re-roll a failed ranged Hit roll — the augmetic sight steadying a shot the priest-machines have already lined up. Patience and a good lens are the Mechanicus marksman's twin virtues.
The reinforced robes of the Skitarii — layered ballistic cloth and augmetic weave over the cyborg soldier's frame. They give a 5+ save against any attack, the standard protection of the ranged line. The robe is only the outermost layer of a survivability that rests on augmetics and a priest's care, never on plate alone.
A refractor field generator, worn by the Tech-Priest Dominus. It projects a shimmering energy screen granting a 5+ invulnerable save — a save taken regardless of the attacker's Armour Penetration, since the field turns the blow aside before it ever reaches plate. It is the ward that keeps a maniple's master alive long enough to matter.
A respirator, or the incense-mask the priests favour — sealed filtration that scrubs the air the fighter breathes. It lets the wearer ignore the Gas trait, walking through clouds that would choke a mortal. The Machine God's servants breathe what they are told to and no more.
A sacred icon — a cog-toothed banner or reliquary standard raised over the maniple, heavy with the Omnissiah's blessing. A friendly fighter within 6" of the icon may re-roll a failed Nerve test, steadied by the sight of the holy machine-sigil. A maniple may field only one such icon.
The servo-arm and blessed tool-array an Enginseer or Datasmith bears — the instrument through which the Rites of Repair are worked. With it the priest hauls a fallen Construct upright and welds its wounds shut. It is not a thing bolted on for war, but the very hand with which the maintenance-priest tends its machines.
A servo-skull — the gilded skull of a faithful servant, reborn as a floating familiar that drifts at its master's shoulder. It relays sight and sensor-data across the field, a hovering eye for the maniple. A small, grim testament that in the Machine God's service even death is only a change of duty.
The striding walker-mount of a Sydonian Dragoon or Ironstrider Ballistarius — a two- or three-legged engine that carries a Skitarii rider high and fast across the field. The mount is the Brute chassis itself, not a fitting added to a foot-soldier; rider and walker are reckoned together as one war-engine.