Unlock the ultimate shooting experience with the all new Meprolight MCO Pro. Meprolight's advanced closed emitter design shields against all elements for peak performance in any environment. It features a user-selectable 3-segment reticle with 10 daylight and 2 nightvision settings allowing you to customize visibility for every scenario. Setting 5 gives you an impressive 25,000+ hours of battery life, complemented by automatic and manual brightness control along with a convenient shake awake feature. Plus, the recoil block ensures alignment and zero hold, it is also IP67 water/dust proof rated. This durable optic is built for precision. Specifications: Mount: MIL-STD-1913 Mounting Screw Torque: 35 in/lbs Emitter Type: Closed Dimensions: 2.06" L x 2.28" H x 1.59" W Weight: 5.33oz w/ Battery Body Material: 7075 T6 Aluminum Battery Type: CR2032 Battery Life: 25,000+ Hours on Manual Setting 5 Sleep Mode: 1 Hour, Shake Awake Auto Shut Off: Constant On Magnification: 1x Brightness Levels: 10 Daylight & 2 Night Vision Illumination Modes: Auto & Manual Windage & Elevation Adjustment: 0.5 MOA per Click Elevation Travel: +/- 30 MOA Windage Travel: +/- 30 MOA Eye Relief: Infinite Parallax: Free