The GBU-39 is a GPS-guided Small-Diameter bomb available for all playable aircraft to utilize. A single rack can hold 4 bombs at once, making it a viable cost-friendly option for restricted missions. Unlike its relative, the GBU-38, the GBU-39 has less radius and damage, but is still a viable bunker-buster and can deploy its own glide-wings to hit targets from farther away. This maneuverability addon allows it to function more accurately when lobbed over cover. The GBU-39 requires set GPS coordinates for deployment; this makes its bombs extremely accurate against ground targets, but makes it somewhat useless against moving units.
GBU-39ER[]
The GBU-39ER is a variant of the GBU-39 exclusively available to the AH-94. Unlike regular GBU-39s, the GBU-39ER has a brief booster stage for launched missiles, allowing them to gain velocity on deployment to account for the AH-94's lack of flight speed. It is the only weapon on the AH-94 capable of destroying bunkers.