Wow this is an old thread.
Save yourself money and a headache, buy Olight. I've had Surefire in the military and InForce on personal firearms, but they aren't worth it anymore. You can get an Olight for less with more lumen and just as sturdy (if not more so). Check out some reviews on Youtube.
I just recv'd my first Olight (Balr Pro w/ G. laser) today. I was pleasantly surprised at how good it is for the price. Planning to order another this week.
Their YouTube reviews sold me on giving them a try.