Feedback Loop is a gadget gear perk that gives you gadget ammo back when you kill enemies with gadgets. It keeps throwables like knives and grenades topped up during long fights.
Each gadget kill refills some of your gadget ammo. A run of grenade or throwing knife kills can keep your supply steady.
Strong if gadgets do most of your killing. Gun-focused players will barely notice it.
Gadget Sniper makes throwing knives and axes lock on, which makes gadget kills much easier.