The missiles he used are from the Armorcast line of pewter upgrades, and at around $5 for 4 they are priced pretty good IMHO.
Plus being metal, they can stand up to tabletop abuse to boot!
All hail the Omnissiah of Metal, Armorcast!
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Plus get a free Horus Heresy Squad for signing up! Click for all the details.Episode 84 - Disciples of Tzeentch The Bird is The Word