The second-generation Swampfox Liberator red dot has improved features, including Shake N Wake auto on/off, a 2 MOA dot emitter, and a longer battery life. It offers 2 night vision and 8 daylight illumination settings and comes with both a low profile and an absolute co-witness height 1913 MIL-STD picatinny mount. It is small, durable, waterproof, and suitable for 12 gauge shotguns and .308 rifles. The glass has multiple coatings for clarity, scratch resistance, anti-glare, anti-fog, and hydrophobic.In the Box :OpticAbsolute Co-Witness 1913 Picatinny MountLow profile 1913 Picatinny MountCR2032 BatteryLens ClothS-wing WrenchRubber Lens Cover