Viridian literally wrote the book on green dot sights with the release of the original green pistol reflex sight two decades ago. The all-new RFX45 represents the next breakthrough in Viridian's line-up, offering fully multi-coated clarity, all-day visibility, INSTANT-ON technology, and impressive 50,000-hour battery life. The 5 MOA green dot is easier to see in daylight conditions than a traditional red dot, while still remaining highly visible at night-so you have the right dot for every hour of the day. The enclosed-emitter design and machined 6061 aluminum body help protect the internal components, while IPX6-rated construction keeps the unit 100% waterproof, fogproof and shockproof. When used with an INSTANT-ON compatible holster (sold separately), the unit comes to life when you draw your pistol-no need to fumble with switches or settings. The RFX45 fits Aimpoint ACRO footprints, and also comes with a Glock MOS adapter that allows it to mount on any Glock MOS-compatible pistol. 5 MOA green dot reticle is highly visible day and night 8 daylight & 2 night vision brightness settings Fully multi-coated optics for superior contrast and clarity Enclosed emitter design protects the internal components Hard-coat anodized machined 6061 aluminum 100% waterproof, fogproof and shockproof Up to 50,000-hr. battery life ECR INSTANT-ON technology brings the unit to life quickly when used with a compatible holster (not included) Fits Aimpoint ARCO footprint, and includes Glock MOS adapter to fit Glock pistols Just 1.73 oz. Order today!