Kakster:
Boo--I didn't want to know that. Now I will probably be tempted to buy an L6 so that I can use two 168s batteries /ubbthreads/images/graemlins/broke.gif Haha, backwards, I know... buy a light to save on battery costs /ubbthreads/images/graemlins/thinking.gif
Hmmm, ok, maybe not. I actually like the output of the M4 incan.
ERiC: I don't have any pics of the light in my hand, but the light is 12 inches long. If you have a TigerLight FBOP, the M4 is just a bit longer than that (well, a tailcap length longer).