I just received a used Z3 and want to know if all the pieces are correct. It has a Lexan lensed anti-roll bezel and a lock-out tail cap. The tail cap has no markings (i.e. 6, 9, 12z lights) to indicate the model and is a surefire.com version. The serial number has an A prefix and the number is just over 10K. Does this light sound completely original?