The Burris FastFire 3 is a compact reflex red dot sight designed to provide a clear aiming point without adding unnecessary bulk to a firearm. This exact configuration uses a 3 MOA red dot, giving shooters a practical balance between quick visual acquisition at close range and precise placement on smaller or more distant targets. Its 1x optical system supports both-eyes-open use, while unlimited eye relief allows flexible positioning behind the sight. The included detachable Picatinny mount makes this model ready for installation on compatible rail-equipped rifles, shotguns and handguns, and the optic can serve as either a primary sight or a supplementary sight paired with another optic. Brightness can be controlled through three manual settings, or the automatic mode can react to surrounding light conditions and adjust the dot for the environment. The battery compartment is positioned on top, allowing the included CR1632 battery to be replaced without removing the sight and disturbing its mounting position. An automatic eight-hour timeout helps conserve power when the optic is left on. Windage and elevation controls use 1 MOA adjustments for straightforward sight-in, and the parallax-free design helps maintain a consistent point of aim. The 21x15mm viewing window is treated with Burris Hi-Lume multicoating to improve usable light transmission and reduce glare. Measuring only 1.9 inches long and weighing 1.5 ounces, the FastFire 3 is well suited to applications where maintaining firearm balance and handling is important. Its matte black housing is waterproof and built with a shockproof design intended to withstand repeated recoil and regular field use. This model combines simple controls, a versatile dot size and a low-profile mounting arrangement for hunting, target shooting and practical firearm setups.Specifications and Features: 3 MOA red aiming dot 1x magnification with unlimited eye relief 21x15mm sight window Automatic brightness adjustment and 3 manual brightness levels 1 MOA click adjustments with 115 MOA elevation capability Parallax-free optical design Top-access CR1632 battery included Detachable Picatinny mount included Waterproof and shockproof construction Matte black finish Length: 1.9 inches Product Weight: 1.5 ounces Brand: Burris Series: FastFire 3 Product Type: Reflex Red Dot Sight Manufacturer Part Number: 300234 UPC: 000381302342