Gunstaff
From Jak and Daxter Wiki
The Gunstaff is the featured weapon in Jak and Daxter: The Lost Frontier. At first it only has melee attacks, but through upgrades you can make it similar to the Morph Gun in Jak II. So far known there's only a blue, red and yellow version (presumably each Eco type).
Possibly there's also a fourth weapon, though it is unknown if this will be Green or Dark Eco based.
The types of the gunstaff will probably be the same as in Jak II, as in the red mod being like a shotgun, the blue mod being like a machine gun, and the yellow mod being like a rifle. As nothing is known about the fourth mod is known, nothing can be said about it's use, but if it is dark eco based, it will probably be like the peace maker.
The upgrades that can be made could probably be similar to the upgrades that you earn in Jak 3, like the yellow mod being upgraded to rebound all over the place.
