GBU-49 Dual Guidance

How do I use the GBU-49s in GPS mode? whenever I lose laser lock they fall to the ground like regular GBU-12s.

you can go to options and toggle “enable laser designator on launch”.

the way these weapons work is, they initially use GPS guidance, but if you enable laser, they basically become laser guided bombs (in game thats how it is), hence they lose their lofting and range features