User blog comment:DragonNotHentai/Myrtenaster! Blog the 4th./@comment-6567499-20130221194403

Several PoV's. From a naming PoV w.r.t RPGs, dust could refer to the region it was forged/made in. Or perhaps forged and imbued with some kind of (magical) dust. Probably doesn't have dust in it's name but it might be a dusty place ie prairie /desert. Dust could also be a name of a character but... \shrugs.

Metaphorically it could hold the meaning of from dust to dust, ashes to ashes. It could mean that it's a fearsome weapon, or perhaps something about it's creators or the user. A rather existential phrase at any rate.

Whatever it is, it's a rather odd name considering Weiss isn't something you would associate with dust. Perhaps she wasn't the original wielder? Or it could be that Monty has horrible naming sense. The Crescent Rose wasn't a "sniper" at all.