"Shoots three bullets in a spread" -Weapon Description
The Triblaster is the next weapon to get (in order of easiest to hardest), it shoots three Blaster bullets but faster and with more shots.
Same damage as the Blaster, just faster and more rounds.
As of update 3.37b the triblaster fires three circles, with more surface area it makes hitting enemies easier.
The triblaster now fires faster.