AGM 14NV4123474111 NVG-40 3APW NIGHT VISION GOGGLES DESCRIPTION. The AGM NVG-40 is a dual-channel night vision system. The NVG is made of a compact composite. Housing for durability, and features advanced multi-coated optics. The device can be outfitted with. Either a Gen 2+ or Gen 3 high-performance image intensifier tube (IIT). The bright light cut-off feature. Ensures that the high-quality photocathode tube is protected. The NVG is also equipped with Manual. Gain Control, which adjusts the image brightness, providing the highest possible image quality even in. Operating from a ...