Boltgun - Warhammer 40k - Lexicanum
Jun 21, 2018 · Umbra pattern. The Umbra pattern boltgun was first used in the later years of the Great Crusade and was produced in large quantities.. The variant known as Umbra Ferrox was mass-produced by Chapter Techmarines to ensure that enough weapons and ammunition were available during the ongoing Horus Heresy.