Artificers have a propensity to call any sort of ranged weapon a 'bow' of some sort, hence the name of this weapon. The nailbow is a boxy device that uses firepowder charges to propel bolts. There hasn't been a detailed description of this yet, but we know a number of things. It can be fired in quick succesion and it uses magazines of 10 shots. The magazine apprently uses a spring and lever device. This must mean that the ammunition includes the firepowder in some way. Though likely designed by a beetle and produced in Helleron, this weapon is most often used ants, with Balkus being the most prominent.