Mercenaries, thaids and young girls
This kind of equipment was called "artifacts" in Etrium and resulted from crafters' work. Lately, Etrium crafters learned how to use thaids' body parts to make equipment, but it was still a relatively new technology, and the crafters mostly used ores.
However, aside from their brain crystal powers, melee soldiers and mercenaries usually liked to use melee weapons as their main attacking tools, since they only had to pay for their maintenance and didn't need bullets.
On the opposite side, ranged fighters preferred guns or weapons related to their brain crystal powers. People who could make mana arrows naturally used bows, for example, unless they could do without them.
Camille and Ramon, and almost all the members of the band of giants, were preparing themselves for an urban fight.