Cerberus

The Cerberus (ケルベロス, Keruberosu) is Vincent Valentine's weapon of choice in both Final Fantasy VII: Advent Children and Dirge of Cerberus -Final Fantasy VII-. It is a powerful handgun capable of shooting three bullets at the same time. While it first appears in Final Fantasy VII: Advent Children, the gun also appears in the movie's prologue despite not being mentioned in the original Final Fantasy VII, possibly indicating that the Cerberus has been retconned to have been his default weapon, replacing Quicksilver.