An image of the original AN/PEQ-16 IPIM (Integrated Pointer Illuminator Module) prior to the more recognizable redesign used in the AN/PEQ-16A and AN/PEQ-16B.
US Marine Corps
<a rel="nofollow" class="external text" href="https://info.publicintelligence.net/USMC-OrdnanceEquipment.pdf">TM 8000-10/1D U.S. MARINE CORPS TECHNICAL MANUAL PRINCIPAL TECHNICAL CHARACTERISTICS OF U.S. MARINE CORPS ORDNANCE EQUIPMENT</a>