If you are talking about the UA2 and UB2 with 2 X CR123 configuration, sad to say it won't ever happen. Surefire has dropped the idea completely and has opted to go ahead with the 3 cells UB3T (turbo head) Invictus. That's all that you would get for now. I am not sure if I got this right but one of the reason Surefire dropped the idea of producing the 2 cells version has got to do with efficiency and run time.