While I like unconverntional characters as much as the next person.

"Guns", in the sense of firearms, don't really exist in Oublioth. In a world where you can blow up rocks by paying a wizard a few coins, there's no real need to develop gunpowder, which in turn means that nobody's figured out that rifles and pistols are vastly superior to bows and crossbows.

Now, if you want magic-projectile shooting apparati, things like wands, staves, arcane foci and other such equipment exist - just not in the shape of 'guns'. Of course,I suppose you could just bend a wand into the right shape or something... Not that I'd know how or why your character would do that, not having ever seen a real gun before, buy hey - details.