Sig Sauer Electro-Optics SOR02160 Romeo-Rs Compact Black 1X24mm 6 MOA Red Dot Reticle The Romeo-Rs (Reinforced Steel) Was Specifically engineered To Provide The Accuracy And Convenience Of a Pistol-Mounted Red Dot at a Cost That competes With High-End Iron Sights. 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. Featuring a Convenient Side-Mounted Illumination Adjustment Button Embedded Into The Polymer Housing To Prevent Accidental Interference; Side-Load Battery Tray; MOTAC (Motion Activated Illumination) That Powers Up When Motion Is Detected, powering Down When Inactive; updated Footprint Design maintains True Compatibility With Industry-Standard Optics cuts While Allowing For The Additional Lock-Up Strength Provided By Steel Recoil pins To Eliminate The Potential For Any Lateral Shift. Magnification: 1X Objective: 24mm Dot Size: 6 MOA Length: 1.61" Weight: 21.40 Oz Battery Size: Cr1632 Reticle: Red Dot Optic Coating: SpectraCoat