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Galvanic-caster
From Warhammer 40k - Lexicanum

Secutarii Peltast with Galvanic-caster
The Galvanic-caster is a type of Galvanic Weapon used by the Adeptus Mechanicus.[1]
Wielded by Secutarii Peltasts, this electro-galvanically driven projectile weapon is akin to a Combi-weapon. With its main weapon mechanism, it is able to fire rapid bursts of low velocity razor-edged flechettes, or with its secondary discharger, attack concealed targets with retina-burning ignis charges. Some of these weapons are upgraded with a high-intensity capacitor which compresses the galvanic charge to fire an armour-piercing inert slug-shot at supersonic velocity. This complex but flexible weapon allows the Peltasts to engage a wide variety of enemy targets.[1]
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