Reactive Shock

Reactive Shock is the four-piece set bonus of the AION Adapter Armor set from The Edge of Fate. While Force Absorption is active, taking melee damage causes you to emit a disorienting burst once. The bonus works alongside the two-piece Force Absorption bonus of the same set, which temporarily reduces incoming area-of-effect damage after a final blow with a rocket launcher, grenade launcher or micro-missile.

The AION Adapter set is a Kepler set, and any four of its five pieces activate the four-piece bonus. Some guides say the burst affects only enemies in melee range and applies a mild stagger, so it is best treated as a defensive tool against enemies who rush you while you use explosives.