This is a Surefire integrated switch light forend for an AR15 or M4. It has the three battery pack and different switching options. It has the option of a pressure switch on the side or a constant on/off toggle switch on the back of the unit. It also has separate LED running lights which have their own pressure switch. It is in good working order and condition and comes with three fresh batteries. It also comes with extra bulbs like the original plus one extra power LED bulb that I added later. I'm also including a sure fire battery and bulb case. This is an impact resistant unit to protect and carry  a spare bulb and six batteries.
 

I have more pictures and I can take any others you like. It comes with original box and manuals as well. Cash only please.