I have Brinkmann Maxfire LX light I bought from walmart for 20bucks I use a low profile 1inch scope mount and it tightins and looks good with the light total cost is 25bucks for a nice looking flash light that looks good on the gun with a fairly nice beam for what the light cost. I have seen it compared to a surefirs g2 http://www.flashlightreviews.com/reviews/brinkmann_maxfirelx.htm
I also disagree with the pic they show of the beam. I dont have any lines are artifacts in my beam and the beam is almost perfectly round but with the way the tip with the little nouches.
Now I never shot my ar with the light on it I have a .50 beuwolf so I dont know if it will hold up. Anyone got one of these lights on ther ar?