Selling a very lightly used Surefire M500A carbine weapon light. This unit replaces your existing AR-15 hand guards and gives you a powerful spot light and two LEDS at your fingertips. There is one "always on" button accessed by your support hand thumb, a pressure switch activated white LED, and a pressure switch that also activates the main light. The controls are well layed out and easy to use. This is a very solid piece of equipment. This unit has the brighter 225 lumen bulb which runs for 20 minutes if left "always on". It can be replaced with a 125 lumen bulb which has a 60 minute run time when "always on". $250.00 This light is in excellent condition. I'm in the Beaverton area for a FTF.