At least for patrol, probably all modes. Hopefully you can retro-fix all the past games also, maybe related to the last companion update that showed precision percentage for individual weapons or something.
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Look in grimoire cards for weapons? Should be there
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It's obviously not coming back since they've done a few updates now since it stopped working. I just wish they would take it away from the end game screen. Just another thing that looks unprofessional. I mean do the guys at bungie not play it and see that none of them had any head shots or grenade kills?