BF6 Helicopter continuos barrage?

Hey I was messing in open servers to relearn how to fly heli's on controller (tried to match bf3/4 settings best I can) and I couldnt figure out how to make it so that holding down the fire button will continuously launch the missiles rather than having to press the fire button for each individual one like its semi auto. It certainly would make barrages smoother rather than trying to keep steady AND fluttering LB on my controller. Anyone know how? Thank you.