The Burris FastFire 3 are their top-selling Red Dot Sights. Available in a 3 MOA or 8 MOA red dot reticle, this is a super-versatile reflex sight. Using a Picatinny/Weaver mount, the Burris FastFire 3 can be put to work on a rifle, shotgun, or handgun with a simple installation. Use it as the primary sight, or mount on top of a longer-range primary to serve as a close-range or backup sight. The Burris FastFire III has automatic brightness sensors to match lighting conditions on the fly, or you can use the 3 manual settings. Plus, the battery compartment has a top-access hatch so you don't have to remove the optic to swap it out (CR1632 battery included). There's an 8-hour automatic time-out feature, and, depending on how much you use the red dot sight, a battery could last for up to 5 years! Compact, tough, and reliable, you just can't go wrong with a Burris FastFire 3. Specifications for Burris FastFire III Reflex Red Dot Sight: Manufacturer: Burris Color: Black Finish: Matte Fabric/Material: Aluminum Magnification: 1 x Objective Lens Diameter: 21 mm Objective Window Size: 21x15 mm Illumination Type: LED Illumination Color: Red Brightness Settings: 3 Eye Relief: Unlimited Adjustment Click Value: 1 MOA Field of View, Linear: 190 ft at 100 yds Parallax: Parallax Free Battery Type: CR1632 Battery Quantity: 1 Operating Temperature: -10 - 130 Fahrenheit Weather Resistance: Yes Length: 1.9 in Weight: 1.5 oz Included Accessories: Standard, Detachable Picatinny Mount Condition: New Magnification Type: Fixed Attachment/Mount Type: Picatinny Adjustment Range: 115 MOA W/E Travel at 100 Yds: 190 in at 100 yds Features of Burris FastFire III Reflex Red Dot Sight Automatic brightness sensor adjusts brightness to match the environmental conditions; also has 3 manual brightness settings. Battery access is conveniently located on the top of the sight; automatic time-out feature after 8 hours helps battery last up to 5 years. Available with Picatinny/Weaver mount for mounting on rifles, handguns and tactical shotguns. Package Contents: Burris FastFire III Reflex Red Dot 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. @media screen and (max-width: 400px) { #w-block-one { display:table-row !important; } }