Yes it did, but then, I had an older LS Second.
I also replaced the McFlood with the NX-05 optics.
It is funny, because I wanted a "clickie" tailcap, but grew to like the compact nature of the ARC LS with the 123.
Note that, for a long time, I did not carry the ARC LS at all, because the 123 batteries were too expensive, but now that SureFire has 123A batteries at 12 for 15 dollars, hey, it's a bargain!
When the ARC LS4 comes out, it should be an interesting time to see if the LS4 replaces my McLux!