AN/PEQ-2A

The AN/PEQ-2A is a laser emitter that appears in Call of Duty 4: Modern Warfare and Call of Duty: Modern Warfare 2. The laser is only visible when wearing night vision goggles in Call of Duty 4: Modern Warfare.

In game
In Call of Duty 4: Modern Warfare, the AN/PEQ-2A is used exclusively during the single-player campaign. It is mounted on all M4A1 Carbines regardless of whether the player has night vision goggles.

It may be noted as a flaw on Infinity Ward's part that the beam itself is emitted from the muzzle of the weapon on the M4A1 Grenadier and SOPMOD, instead of one of the AN/PEQ-2A's lenses.

In Call of Duty: Modern Warfare 2, A version of a PEQ box can be seen mounted on the Intervention, though it does nothing. However the box emits an infrared light to judge the elevation and range for a designated target.