AGM NVG-40 NL1 Gen 2+ Lvl 1 Green Phosphor IIT Dual Tube Night Vision Goggle/Binocular 14NV4122483011. AGMs NVG-40 Night Vision Goggles are an ideal addition to any nighttime hunting or tactical setup. The core of the NVG-40 is an NL1 Gen 2+ Lvl 2 Green Phosphor IIT one of the best image intensifier tubes offered by AGM with a very limited number of spots in zone 1. Image quality is further enhanced thanks to multi-coated optics, and the manual gain control can be used to adjust the brightness to provide the best possible image in changing light conditions. For applications involving ...