Graves' gun Destiny is hextech, but how about the others, and in Bilgewater in general? In the lore, are their guns able to shoot crazy volumes of bullets like MF's Bullet Time in the game? How common are magical weapons in Bilgewater/Valoran anyway?
Magical weapons are not common at all. You wouldn't see everyone carrying a hextech pistol on their hip. In fact, walking around with such a weapon for everyone to see would quickly garner the sort of attention you don't want. Unless you're Graves, who is perfectly happy with that sort of attention. Destiny is a unique gun that very few smiths in the world would have any hope in replicating. In the story world, you wouldn't necessarily see the exact type of effects as you see in-game.
I hope that helps.
