is one piece episode 619 filler?

Doflamingo sent Baby 5 and Buffalo to retrieve Caesar. Franky (inside the General Franky) caught sight of the two.

Baby 5 mistakes the General Franky for a Pacifista. As Baby 5 and Buffalo approach the robot, Franky fires bullets at them.

Baby 5 replies by using her machine gun. The shooting creates a cloud around the General Franky that leads Baby 5 into believing that the robot was destroyed.

However, when the dust cloud fades, the robot is revealed to be perfectly unharmed. Because of that, she has no choice but to use the powers of her devil fruit.