It can also be used to designate targets for helicopters and jets, and it looks so good on the M4. It should even be there if it could not be used, since a lot of soldiers in Iraq (and Afghanistan) have them mounted on their M4 and M16 riflesThe AN/PEQ-2 Infrared Target Pointer/Illuminator/Aiming Laser has a straight beam of IR energy for aiming, and an adjustable focus IR beam for illuminating. Both sources can be used at the same time. It is powered by 2 "AA" batteries that give it continuous power for 10 hours. The PEQ-2 weighs 7.5 ounces, is 6.4" long, 2.8" wide, and 1.2" high. It is waterproof to 66â$™.
The illuminator is good to 600 meters. The pointer on high power has a range of 5000 meters, and 1000 meters on low power.

To be clear, the AN/PEQ is the device on the front, top Rail. the one on the rear top rail is an Acog Reflex sight




