In response to Chestergw's comment about the lithium AA's and the Twintask bulb, that was the first mod I tried with one of my mini-mags. You have to bore out the reflector just a bit, but its very easy. I did not upgrad the lens, but even without that it was still very bright compared to stock and it threw as far or further than the first Surefire I had just purchased at the time. I did not like the Nite Ize and killed the only one I owned running partially depleted lithium AA's in the light. I now have the TLE-5 and think its alright, and would have been very impressive three years ago........now I'm kind of jaded I suppose, but it is much, much better than stock and really quite useful.