Though it may be costly, this guy will DEFINITELY let your mag outthrow, outflood, out anything ANY AA flashlight.
Gene's C dropin.
Just remember to check the serial number on your mag to make sure the drop in will fit. It's super easy to put it in. Pick up one of the pre-cut reflectors if you don't have a dremel or aren't comfortable cutting it yourself. Also, if you do mod your own reflector, make SURE you don't wipe the plastic shavings off the reflector with any kind of wipe. Pick up a can of compressed air and clean it that way. The finish is extremely fragile. Even running water can scratch the finish with the shavings in it.
Just easier to pick up the pre-cut reflector. Remember to check the serial number. Didn't look at the amazon dropin, I've only had experience with the mag led "upgrade." They don't even compare with Gene's products. Unless amazon is selling them, I doubt they would either.