Purchased from the USA Barracks, the upgrade enables the use of Flashbang Grenades by Rangers and Green Berets that can cause enemies hit by these non-lethal weapons to lose their ability to fight effectively and forced into submission, allowing USA troops to capture them as prisoners of war (POWs) so they can be interrogated in the Detention Camp for valuable intelligence on enemy positions.
Not all infantry can be made to surrender by Flashbang Grenades, however:
- Instead of surrendering, Terrorists will wildly run away to random directions before detonating themselves.
- Due to their fanatical loyalty to the Motherland, Shock Troopers would choose death than dishonor by committing suicide with their own weapons instead of surrendering.
- Heroes cannot be made to surrender due to their special status and training, and would simply be damaged instead.