Well I kinda forgot but I was keeping it in vault and thought it can three headshot kill in Crudible soo i need perfect roll for it.
Zen Moment/Flared Magwell/Third Eye
or
Outlaw/Armor Piercing Rounds or Send it/Third Eye
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Luck in the Chamber, Crowd Control, and Smallbore have helped me wreck many a face. I don't know if that's the "God Roll" for it, but it's been really effective.