Spellslingers supplement their guns with teleportation and sigils. The former works just like you'd expect, allowing a Spellslinger to jump to alternate dimensions, blink about the battlefield, and even phase partly out of reality for protection. Sigils, on the other hand, are symbols that the Spellslinger places to heal allies, swap places with enemies, lay traps, or otherwise mess with the flow of the battlefield. You don't have to take our word for it, though; check out the full DevSpeak on the class just past the break.
[Source: Carbine Studios press release]