AT3 Tactical RD-50 Micro Red Dot Reflex Sight .83in Riser. Parallax free design: The red dot stays on target with following the movement of the users eye. 11 red dot brightness settings provide optimal visibility in any light conditions. Multi-coated scratch resistant amber lens provides enhanced image clarity. Specifications for AT3 Tactical PRO 1x23mm 2 MOA Micro Red Dot Reflex Sight w/ Riser Mount & Armor: Manufacturer: AT3 Tactical Finish: Anodized Objective Window Size: 23 mm Reticle: 2 MOA Red Dot Emitter Type: Enclosed Battery Type: CR2032 Stand Alone Lithium Battery Life: 50000 hours Water Resistance Level: Waterproof Water Resistant Mark: 1 m Fogproof: Yes Gun Model: Universal AR-15 Condition: New Quantity: 1 Switch Type: Dial Red Dot Sights-Footprint: Not Applicable Mount Type: Weaver Features of AT3 Tactical PRO 1x23mm 2 MOA Micro Red Dot Reflex Sight w/ Riser Mount & Armor Fully waterproof with rubber gaskets on turrets and battery cover. Nitrogen filled 6061 T6 aluminum body resists fogging and moisture. Matte black anodized finish resists scratches while keeping a stealthy profile. Shockproof circuitry resists damage from rough handling. Backed by the Lifetime AT3 Warranty. We stand behind our products Package Contents: AT3 Tactical PRO 1x23mm 2 MOA Micro Red Dot Reflex Sight w/ Riser Mount & Armor CR2032 Battery Lens Cover Lens Cloth AT3 Tactical RD-50-83: RD-50 Micro Red Dot Reflex Sight .83in Riser