The Alpha dot sight gives you a competition-ready open-emitter reflex sight thats big on performance without breaking the bank. Designed to fit optics-ready holsters, this red/green dot sight offers you faster target acquisition with a large window featuring a 65 MOA circle and reliable precision from the 3MOA center dot. Featuring adjustable brightness, ten brightness settings, and a battery-extending low-power mode thats canceled instantly using our shake-to-awake technology, its the right choice for your duty or personal protection weapon. Get the top-tier RMR red dot youve been looking for from a brand you can trust when every shot counts. Specifications for Gideon Optics Alpha Red Dot Reflex Sights: Manufacturer: Gideon Optics Color: Black Fabric/Material: 7075-T6 Aluminum Magnification: 1 x Objective Lens Diameter: 27 mm Objective Window Size: 17.5x27 mm Reticle: 3 MOA Dot Brightness Settings: 10 Eye Relief: Unlimited Adjustment Type: MOA Adjustment Click Value: 1 MOA Emitter Type: Open Parallax: Parallax Free Battery Type: CR1632, Lithium Metal Battery Quantity: 1 Battery Life: 20000 hours Water Resistance Level: IPX-7 Length: 45 mm Width: 32 mm Height: 26.4 mm Weight: 1 oz Attachment/Mount Type: Picatinny Features of Gideon Optics Alpha Red Dot Reflex Sights Made with a 7075-T6 aluminum housingthe same alloy often used in firearms production for military M-16 rifles. Features the same mounting pattern as Trijicons RMR red dot sights for plate or slide mounting. A low-profile 1913 Picatinny mount is also included for easy installation on rifles, shotguns, carbines, or 45-degree offset mounts. The large 17.5mm tall by 27mm wide lens window gives you a large sight picture without obstructing your tactical surroundings. Elevation and windage are adjustable 45 MOA each (total MOA range of 90) at 1 MOA per click. Parallax-free to 33 yards with unlimited eye relief. The combination 65 MOA circle/3 MOA dot reticle is available in both red and green, with eight brightness settings for normal light and two night vision compatible settings for ten total levels of adjustment. A single CR-1632 3V Lithium battery provides 20,000 hours of continuous power at brightness level 6, but this is extended to 50,000 hours by our high-efficiency low-power mode that engages after 225 seconds without movement. Motion-sensing technology wakes your sight within milliseconds with any movement, including drawing the weapon or shaking the gun awake. The shockproof and IPX7 waterproof design is built to withstand dynamic tactical situations and keep you ready to respond. Top-load battery drawer makes battery swaps easy without removing or re-zeroing the optic. With a footprint of just 45mm x 32mm x 26.4mm (LxWxH) and weighing in at around an ounce, its a great choice for everyday use and carry. Package Contents: Gideon Optics Alpha Red Dot Reflex Sights A low-profile 1913 Picatinny mount is also included for mounting on compatible rifles Sealing plates Micro fiber clothe and battery included