Of the E2d version of the E Series specifically or the crenelated bezel concept in general?
I guess about a year or so ago for the E2d perhaps.
having crenelations at both ends is likely to have been a concept dragged out of operator feedback of proto-types in use. SureFire works closely with a variety of user groups and has people out-and-about with users.
Products becoming public released models is a whole otherside to SureFire. Almost like a side-line perhaps!
Al /ubbthreads/images/graemlins/grin.gif