The next generation of SIG SAUER S competition-ready pistol reflex sight is here. The ROMEO3PRO is the embodiment of a lifetime of repetition and experience in the competitive environment, refined over tens of thousands of rounds to deliver the most dominant optic to date. Transitioning to the standardized SIG PRO footprint, the ROMEO3PRO will mount directly to your favorite SIG SAUER full-sized optics-ready pistol while maintaining an ultra-low deck height to optimize height over bore axis. SIG s industry-leading aspherical glass lens system provides a generous sight window with unrivaled clarity to expedite target acquisition and eliminate distortion. Available with either a 3 or 8 MOA reticle with 15 total illumination levels, the ROMEO3PRO gives you the ability to fine-tune brightness settings for any environment. Featuring an IPX-7 waterproof rating and 20,000-hour runtime, the ROMEO3PRO is backed by SIG SAUER S Infinite Guarantee . Product Features Common SIG PRO mounting footprint for ultimate compatibility across all modern SIG SAUER full-size optics-ready pistols. 31mm glass aspheric lens with red notch reflector coating for excellent light transmittance, reticle brightness, and zero distortion. Crisp red dot reticle available in various sizes, with 15 brightness settings for rapid target engagement under a full range of lighting conditions. MOTAC (Motion Activated Illumination System) powers up when it senses motion and powers down when it does not. MAGNETAC (Magnetic Activation) turns the optic off when using the included Rubber Sight Cover, for preserving battery life even more between match stages or when storing/transporting the optic. Low-profile aircraft-grade CNC Aluminum housing ensures a lifetime of reliable service, and allows a co-witness with suppressor-height backup iron sights. Dependable waterproof (IPX-7 rated for complete water immersion up to 1 meter) and fogproof performance. 20,000 hour runtime from a common CR1632 battery (at medium brightness settings), in a side mounted tray, meaning there is no need to remove the optic to change the battery. SIG SAUER Electro-Optics Infinite Guarantee Product Specifications RX Footprint: PRO Mount Type: Top Mount Height: 1.31 in [33.5 mm] Magnification: 1x Objective Lens Diameter: 31 mm Overall Length: 1.83 in [46.5 mm] Overall Width: 1.35 in [34.5 mm] Illumination Settings: 13 Daytime / 2 NV Total Elevation Travel: 100 MOA Total Windage Travel: 100 MOA Run Time: 20000 hrs Waterproofing: IPX-7 Battery: (1) CR1632