This race lives underground in massive caverns/cave network. Hundreds of square miles large per cavern. Large/wide/tall enough that they have their own atmospheric conditions, essentially large enough that it doesn't really feel as if you're underground, save for the lack of a sky. Native-inspired culture with some small form of magic via crystals (somewhat of a combination of Na'vi from Avatar and Draenei from Warcraft). Very low-tech, or really no tech at all, though the crystals provide some functionality that tech normally would (similar to draenei tech but still not as advanced).
Due to their environment, rather than utilizing wood+leather for tools and clothing they specialize in metalwork. For their melee weapons I've landed on a sort of large gauntlet, though rather than being a glove it's a large, pointed weapon attached to the forearm, leaving the hands free (inspired as originally being devised as a digging tool, now morphed into a more ceremonial weapon rather than a tool). Here is a commission I've gotten showcasing it for reference.
But when it comes to a ranged weapon I'm drawing a blank. I'd like it to be relatively unconventional, so a typical bow+arrow is out, along with throwing spear. I thought chakrams could work, especially with the focus on metallic materials, but still feel like plain old chakrams would come off as uninspired. I'm open to the idea of a tool that propels objects (like a bow+arrow/slingshot) but it would have to be distinctly different, in appearance, from those and still remain relatively low tech (no combustion like a gun).
Any ideas are greatly appreciated.