How do you aim helicopter turret using HMD on VR Headset?

Is there a way to slave the turret on a helicopter, like the Apache, so that it aims where I’m looking in VR? I tried toggling Aiming with VR HMD in helicopter in options but it won’t track. It only moves when I move the mouse. I tried to go into the aim axis and change the joystick axis but it doesn’t list headset, autodetect axis doesn’t either. I’m using mouse aim mode does it need to be in a different control mode?