The RT-3 Prismatic Red Dot Sights have a Picatinny mount so they’re ready to go on your AR or MSR platform. At only 8.8 ounces and 3.5 inches, the lightweight and small footprint leave plenty of room for adjustment. The 3x magnification combined with the 33.8mm objective lens diameter gives you a huge field of view! Burris has chosen their Ballistic 3X Reticle for this sight. It allows for fast target acquisition with the stadia lines and center horseshoe reticle. It also has fine aiming lines for elevation and windage adjustment, and precise shot placement at distance. The broken circle design with a center dot is proven for ultra-fast engagement at short distances. The center illumination is daylight-bright and won’t wash out in harsh light. Specifications for Burris RT-3 3x Red Dot Prism Sight: Manufacturer: Burris Color: Black Finish: Matte Magnification: 3 x Objective Lens Diameter: 20 mm Objective Window Size: 38 mm Reticle: Illuminated Ballistic Illumination Type: LED Illumination Color: Red Eye Relief: 2.6 in Adjustment Type: MOA Adjustment Click Value: 1 MOA Emitter Type: Enclosed Field of View, Linear: 38.2 ft at 100 yds Battery Type: CR2032, Lithium Length: 3.5 in Weight: 8.8 oz Red Dot Sights-Footprint: Not Applicable Mount Type: Picatinny Shell Length: 3 1/2 in Gun Rail: Picatinny Features of Burris RT-3 3x Red Dot Prism Sight: Ballistic 3X Reticle 3x Magnification Clear Objective Lens Diameter 33.8mm Matte finish FOV (Field of View): 38.2 feet @ 100 yards Picatinny Mount Eye Relief 2.6in CR2032 Battery Elevation Adjustment, Total Capability - 50 MOA Windage Adjustment - 50 MOA Package Contents: Burris RT-3 3x Red Dot Prism Sight Burris Forever Warranty (Non-Thermal Optics) and Three Year Limited Warranty (Thermal Optics) All Burris Optics (with the exception of Thermal products) are covered by the Burris Forever Warranty™. Burris Company, Inc. ("Burris Co. or "we") warrants that its Burris Optics products (nonthermal optics products) will be free from manufacturing defects for the product's lifetime from the date of purchase or delivery (whichever occurs later). Burris Co. also warrants that its Burris Thermal Optics products will be free from manufacturing defects for a period of 3 years from the date of purchase or delivery (whichever occurs later) by the original purchaser. Warranty information and warranties are supplied solely by the manufacturer, and not this retailer. This retailer publishes information from the manufacturer for information purposes only, and the manufacturer is solely responsible and liable for any warranty information and warranties published by this retailer. Please reference the appropriate manufacturer documents or reach out to the manufacturer directly for full warranty terms and effective dates.