Knucklehead Radar's exotic perk provides Third Eye for your primary weapon. Not much in comparison to Symbiote, Ram or Armamentarium. Also, it provides strength. Generally the least favorable stat.
But guess what? In Inferno, KR isn't exotic at all. It's Exotic Perk, unlike every other Exotic armor, doesn't work at all.
Knucklehead Radar should provide radar when ADS with your primary weapon in all game modes, including Inferno.
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Personally, I'd like KR to still work in Inferno- when ADS- but rather than constantly provide radar- it could work like the standard radar does when foes are crouching, showing them on the radar in momentary intervals.
Edits: when foes crouch, they still won't show up. Radar only works when ADS of course.
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1 AntwortenBzzzt - Wrong Answer Inferno is great because it stops spawn camping.