It appears that after the latest update, the Auto Ranging for both the CPG and Pilot has been broken.
Steps I took:
Pilot:
Lift off, holding at Hover
A/S: Armed
WAS Gun
Weapon Page
Manrange boxed
"A" entered into Computer
Enter Pressed
Range still showed M1.5 in HMD
WAS Rockets
Weapon Page
Manrange boxed
"A" entered into Computer
Range still showed M1.5 in HMD
Gunner - Same steps as above but range showed M3.0