Just recieved my M1 with OP reflector from Battery Junction. It ROCKS, Great light. I want to weapon mount it now to my AR15. Does anybody make a tactical clickie (momentary on/off ,not a reverse clickie that it came with) for this light or even better a tapeswitch tailcap? Will a Pentagon or Surefire tail cap fit? Anybody know what thread the tailcaps are? Thanks.