Which feature enhances the range and stability of the GBU-39?

The feature that enhances the range and stability of the GBU-39 is the Diamondback Wings. These wings allow the munition to glide over long distances, effectively increasing its range from the launch platform to the intended target. The design of the Diamondback Wings aids in maintaining stability during flight.

In contrast, laser guidance focuses on precision targeting rather than on extending range or stability during flight. Smart technology generally enhances a weapon's ability to operate autonomously and make adjustments based on target conditions, but it doesn’t directly contribute to the physical characteristics crucial to range and stability as the Diamondback Wings do. BB-61 stabilization, while it might relate to general stabilization technology, does not specifically reference an aspect of the GBU-39 and does not contribute to the unique gliding capability that the Diamondback Wings provide. Therefore, Diamondback Wings stand out as the feature specifically designed to enhance both range and stability for the GBU-39.