Night Vision rifle optics are infrared light enhancement devices designed for mounting on weapons and equipped with one or more reticle pattern. NV scopes are sometimes called Starlight Scopes. Night Vision Scopes just like most other night vision optics can be equipped with different types of night vision tubes ranging from Gen 1 to Gen 3 FLAG (also known as Gen 4). Gen 2 standard night vision rifle scopes typically have resolution of 40-51 lp/mm. These scopes on average offer shooting range of up to 170 yards. Most notable models in this category are Armasight Nemesis, ATN Ares, Armasight Spear, Bering Optical Avenger and Armasight Vulcan. Most Gen 2 night vision rifle scopes come with fixed 2x, 4x or 6x magnification.