Gideon Optics Rock Reflex Sights 3 MOA Green Dot Reticle Black. Packed with industry-leading features like shake-to-awake technology multiple brightness levels and adjustable windage and elevation this RMR-patterned pistol red dot has a lens window just 15.5 mm tall that sits tight to your slide for easier carry under clothing and trouble-free deployment. This is the perfect choice for handguns as a primary optic on your home-defense shotgun a backup sight on a tactical rifle or for smaller-framed pistol caliber carbines. Get big performance in a small package made by an optics brand you can trust when every shot counts. Specifications for Gideon Optics Rock Red Dot Reflex Sights: Manufacturer: Gideon Optics Color: Black Fabric/Material: 7075-T6 Aluminum Magnification: 1 x Objective Lens Diameter: 22 mm Objective Window Size: 15.5x22 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: Lithium Metal CR1632 Battery Quantity: 1 Battery Life: 50000 hours Water Resistance Level: IPX-7 Length: 45 mm Width: 32 mm Height: 26.4 mm Weight: 1 oz Condition: New Red Dot Sights-Footprint: Not Applicable Mount Type: Picatinny Gun Rail: Picatinny Features of Gideon Optics Rock Red Dot Reflex Sights Features a 15.5mm x 22mm lens with unlimited eye relief and parallax-free operation out to 33 yards for faster and more accurate target acquisition in dynamic tactical situations without occluding your field of view. Choose from a red or green color for your combination 65mm circle and 3 MOA dot reticle. Adjustable at 1 MOA per click through a 45-click range for both windage and elevation (90 total). User-adjustable brightness settings allow for ten gradients 8 for normal light and two that are night vision compatible. Ready for mounting on standard RMR footprints or with the included low-profile 1913 Picatinny mount. A single CR-1632 3V lithium battery can provide up to 50000 hours of service life thanks to an auto-engaging low-power mode that turns off the reticle at 225 minutes of inactivity but reengages when the weapon is drawn or moved thanks to our shake-to-awake sensors. Changing the battery is easy thanks to a top-loading battery tray that does not require removal from the weapon or re-zeroing of the sight. The housing is field ready with an IPX7 waterproof and shockproof design and 7075-T6 aluminum alloy housing. Measures 45mm x 32mm x 26.4mm (LxWxH) and weighs around one oz. to keep your firearm feeling light and reactive. Package Contents: Gideon Optics Rock Red Dot Reflex Sights A low-profile 1913 Picatinny mount is also included for mounting on compatible rifles Micro fiber clothe and battery included Gideon Optics RK10GN: Rock Reflex Sights 3 MOA Green Dot Reticle Black