Gemini is the tier 6 skill in Axton's Survival skill tree. It allows Axton to deploy two turrets. The second turret can be deployed at any time after the first is placed on the field, and it has the same duration as the first. Most turret upgrades, including Longbow Turret, Phalanx Shield, Scorched Earth, Mag-Lock, Double Up, and Nuke, apply to the second turret if the player has invested in those skills.