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 : Optic Absolute Co-Witness 1913 Picatinny Mount Low profile 1913 Picatinny Mount CR2032 Battery Lens Cloth S-wing Wrench Rubber Lens Cover