The newest infrared laser pointers increase the night firing accuracy of infantry weapons. The new family of weapon mounts (some fielded with the thermal weapon sight) and helmet brackets are more stable and reliable for continued accurate firing under field conditions. Their effectiveness is limited by the capability of the image-intensifying (I2) sight with which they are used. Normally, this is a night vision goggle or monocular, with or without the 3X magnifier. They primarily enhance the gunner's ability to align his sights on the target, and usually have dramatic affect on his firing positions and scanning technique.
Unlike I2 sights mounted on the weapon, the gunner can somewhat reduce the adverse effects of muzzle flash by rising up higher off the sight with his helmet-mounted goggle or monocular. With the AN/PEQ-2A, the range of these devices is greatly improved, allowing great effectiveness for crew-served weapons out to 2,200 meters. However, trainers and leaders must adopt new safety procedures to ensure these lasers, which are not safe for the eyes, are treated like loaded weapons any time the batteries are issued. The bore light is effective to boresight these pointers. Generally, weapons do not require zeroing with live ammunition to confirm alignment after Soldiers and leaders are qualified in the boresighting techniques. The M136 AT4 cannot be conventionally boresighted; therefore, a sight alignment method is used to zero the aided vision device.
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