Active Gear is a subset of gear items featured in The Last Stand: Dead Zone. The slot to equip active gear is after the passive gear slot. To equip, click the slot and select the desired item. They are activated by selecting the survivor who has Active Gear equipped, then right-clicking on any part of the screen to use it there. Currently, Active Gear is one-use only, and will affect both enemies and fellow survivors.
The amount that one can carry is determined by the carry limit, which is influenced by Carrier Harnesses, and the Active Gear in use.