SIG SAUER Romeo-RS Pro 1x31mm Reflex Red Dot Sight Circle Dot Black. Inspired by the design of modern striker-fired pistols that employ high-strength polymer and metal the ROMEO-RS housing forms around a rugged steel chassis that supports and protects a premium aspherical glass lens. Threaded metal inserts allow for optimal torque load when mounting the optic to a pistol slide and installing the side-load battery tray while additional metal inserts provide increased accuracy and strength for the windage and elevation adjustment mechanisms. The ROMEO-RS features a convenient side-mounted illumination adjustment button protected by a raised steel housing that prevents accidental interference and the side-load battery tray makes battery replacements easy to do while maintaining zero. SIG SAUERs updated footprint design maintains true compatibility with industry-standard optics cuts while allowing for the additional lock-up strength provided by SIG-LOC recoil pins to eliminate the potential for any lateral shift. Built in Tualatin Oregon the ROMEO-RS was engineered to deliver premium red dot functionality at a cost thats within reach of any shooter. Specifications for SIG SAUER Romeo-RS Pro 1x31mm Reflex Red Dot Sight: Manufacturer: SIG SAUER Fabric/Material: Steel/Polymer Magnification: 1 x Objective Lens Diameter: 31 mm Illumination Type: LED Brightness Settings: 8 Eye Relief: Unlimited Adjustment Click Value: 1 MOA Emitter Type: Open Lens Material: Glass Optical Coating: Spectracoat Battery Type: CR1632 Battery Quantity: 1 Battery Life: 20000 hours Length: 1.83 in Width: 1.42 in Height: 1.21 in Weight: 26.6 g Red Dot Sights-Footprint: Deltapoint Pro Lens Type: Aspherical W/E Travel at 100 Yds: 70 MOA Features of SIG SAUER Romeo-RS Pro 1x31mm Reflex Red Dot Sight Hybrid design featuring a skeletonized steel chassis molded into a high-strength polymer housing Molded glass aspheric lens for a distortion-free sight picture High efficiency point source LED emitter with 8 individual brightness settings Large side control button for easy reticle adjustments Convenient side-mounted CR1632 battery tray with security screw for easy access without removing the optic from the firearm Minimum continuous runtime of 20000 hours MOTAC (Motion Activated Illumination) that powers up when motion is detected powering down when inactive Package Contents: SIG SAUER Romeo-RS Pro 1x31mm Reflex Red Dot Sight SIG SAUER Infinite Guarantee SIG SAUER SOR02000: Romeo-RS Pro 1x31mm Reflex Red Dot Sight Circle Dot Black