Most indications from SureFire point to the E2e being released sometime in mid-February after the SHOT show.
All SureFire lights activate either by pressing the rubber button at the bottom of the light for momentary light, or by turning the tailcap clockwise for full constant-on activation of the light. The lockout tailcap (LOTC) prevents the momentary activation by allowing the user to turn the tailcap approximately 1+ revolutions toward the off position thereby locking the tailcap button out and preventing accidental activation of the light while transporting it, carrying it in your pocket, etc. Many SureFire users have/had complained about the lights being accidentally activated while in their pocket or while carried in their bags, leaving the batteries dead just when the light is needed.
Bucky