FASTFIRE(TM) E RED DOT REFLEX SIGHTS Rugged Precision. Unmatched Reliability. The Burris FastFire E is the first fully enclosed emitter red dot in the FastFire series, engineered for pistols, shotguns, and carbines. Built from monolithic machined aluminum, it's waterproof, shockproof, and fogproof-ready for any environment. The 3.5-MOA dot with an "always on" feature ensures instant readiness, powered by a CR2032 battery with 60,000-hour life. Its aspherical lenses provide a distortion-free, glare-resistant view, enhanced by eight brightness settings (two night vision compatible) and a red dot. A wide 22x17mm window and 1X magnification enable Mfg: Burris