Description The open reflex ROMEO3 sight is the ideal sighting solution for MSR rifles, shotguns, carbines, submachine guns, and full size handguns. Our proprietary red-notch coating ensures a bright red dot. ROMEO3 is perfect for those moments when you barely have time to blink. The readily available CR2032 battery is side-loading, allowing for quick battery replacement without having to remove the sight from the firearm. Extremely strong and lightweight aircraft grade CNC Aluminum housing ensures a lifetime of reliable service. Dependable waterproof (IPX-7 rated for complete water immersion up to 1 meter) and fog-proof performance. Includes M1913 Picatinny low-rise mount and premium, quick release QD1.41" co-witness riser mount. Features Versatile for various firearms Clear red dot with proprietary coating Quick target acquisition Easy battery replacement with side-loading CR2032 Durable aircraft-grade CNC aluminum housing Waterproof and fog-proof (IPX-7 rated) Includes Picatinny low-rise and QD1.41" co-witness riser mounts Compact and lightweight: 69.7 mm x 44.8 mm x 62.9 mm, 5.7 oz Long battery life: 35,000 hours 12 illumination settings (10 daytime, 2 night vision)