The AN/PEQ-6 Integrated Laser Light Module (ILLM) is a laser aiming module (LAM) designed and manufactured by Insight Technology[1] [2] for use by United States Special Operations Command (USSOCOM) with the Heckler & Koch Mark 23 semi-automatic pistol and a Knight's Armament Company suppressor; the whole system is designated the Mk 23 Mod 0 Offensive Handgun Weapon System.[3]
The device attaches to the accessory rail on the frame, under the barrel, and creates a small laser dot very near the point of bullet impact (within certain ranges). It was developed in the 1990s under the Offensive Handgun Weapon System (OHWS) program run by USSOCOM.[4]
It consists of a laser projector on the left side of the LAM and two tactical flashlights on the right side. One setting of the laser produces a visible light dot, while the other setting produces infrared (IR) light. The illuminator section has a rectangular white light flashlight on the upper part and a rectangular infrared flashlight on the lower part. The IR elements can only be seen whilst wearing night vision goggles.
A boxier early version of the LAM was created by Insight before the smaller more rounded design was finally selected as the AN/PEQ-6. This boxier design can be seen in some games like Metal Gear Solid.[5]