Aimpoint CompM4s Red Dot Reflex Sight Without Mount 2 MOA Dot Reticle Black Semi Matte Anodized. Improvements include improved energy efficiency that provides up to 8 years of continuous use from a single AA battery Aimpoint Red Dot Sights from CompM4 series of sights are available in two versions: The CompM4 offers a high battery compartment while the CompM4s offers a low battery compartment. In all other aspects the Aimpoint CompM4 and Aimpoint CompM4s Red Dot Sight are identical. The CompM4 is now the latest version of the US Army's M68 CCO (Close-Combat Optic) continuing a legacy that Aimpoint has maintained since 1997. The performance of the CompM4 series of sights is optimized for use with all generations of night vision devices (NVDs) but is especially suited for 3rd generation night vision technology. Aimpoint 's unique band-pass coating on the front lens reflects select frequencies of red light at near 100percent efficiency in order to give the highest possible dot brightness with the smallest amount of energy while transmitting nearly 100percent of light in the Infrared and near-infrared part of the spectrum to provide the clearest brightest image possible when used with a 3rd generation NVD. With 7 NVD-compatible brightness settings and 9 Daylight settings including one extra-bright setting the Red Dot Sight CompM4 and CompM4s by Aimpoint are ready for use around the clock. Specifications for Aimpoint CompM4 Red Dot Sight (No Mount): Manufacturer: Aimpoint Color: Black Finish: Semi Matte Anodized Fabric/Material: Aluminum Magnification: 1 x Reticle: 2 MOA Dot Illumination Type: LED Illumination Color: Red Brightness Settings: 16 Eye Relief: Unlimited Adjustment Click Value: 1 MOA Emitter Type: Enclosed Parallax: Free Optical Coating: Multi-Coated Light Transmission: 70 percent Battery Type: Alkaline AA Battery Quantity: 1 Battery Life: 80000 Hours Operating Temperature: -45 - 71 Celsius -49 - 160 Fahrenheit Water Resistance Level: Waterproof Water Resistant Mark: 150 ft Gun Make: Universal Gun Model: Universal Length: 4.7 in Width: 2.1 in Height: 2.1 in Weight: 9.5 oz Included Accessories: Standard Condition: New Package Type: Box Magnification Type: Fixed Lens Finish: Multi-Layer Anti-Reflex Quantity: 1 Switch Type: Rotary Switch Red Dot Sights-Footprint: Not Applicable Mount Type: No Mount Attachment Type: No Mount Wavelength: 650 nm Features of Aimpoint CompM4 Red Dot Sight (No Mount): Compatible with every generation of Night Vision Devices (NVD) Super ACET technology allows up to 80000 hours (over 8 years) of daytime operation on one AA battery Internal voltage regulator allows the CompM4 to be used with any AA size battery. Seven night vision compatible settings and 9 daylight settings 500000 hours of use on NVD setting 2 MOA dot for close combat and long distance engagement Matches perfectly with Aimpoint 3XMag (magnifier module) Unequalled light transmission Front lens opening is threaded for addition of killFlash anti-reflective device Submersible to 150 feet (45 meters) Standardized as the US Army's new M68CCO Improved adjustment caps are easier to remove and are protected against impact Can be used with a carry handle adaptor for use on all M16 rifles Package Contents: Aimpoint CompM4 Red Dot Sight (No Mount) Rubber Bikini Lens Cover AA Battery Allen Key Aimpoint 12308: CompM4s Red Dot Reflex Sight Without Mount 2 MOA Dot Reticle Black Semi Matte Anodized