As I opened the first, I found half a dozen matrix-disruption grenades.  I knew immediately that they were designed to disrupt the spell matrixes of Steel Ranger armor, rendering them helpless just as the alicorn’s attack had done to SteelHooves.  But I couldn’t help thinking how such grenades would also disrupt the more mundane technologies of most robots, including the one guarding this room.

Fallout: Equestria Chapter 15