The Burris FastFire 3 is a red dot sight that will greatly improve on aiming speed and accuracy by eliminating the need to focus on and align the front sight, rear sight and target. 3-MOA or 8-MOA red dot reflex sight with an automatch brightness sensor that adjust to your environment for fast, accurate firing. Its 1x magnification provides an extremely large field of view and allows shooting with both eyes open. Compact, lightweight, waterproof but tough, the FastFire 3 will stand up years of punishing recoil. Clear, bright, and with automatic and manual brightness sensors It has 3 manual brightness settings, plus an automatic brightness adjustment setting that swiftly tailors brightness to match the environmental conditions. High-grade optical glass delivers excellent brightness and clarity, and the index-matched, Hi-Lume® multi-coating provides low-light performance and glare elimination. Windage and elevation adjustments make fine-tuning easy.