The ROMEO8 T is Sig Optic's military grade closed reflex sight. Aircraft grade aluminum housing, generous 38mm lens, waterproof, fog-proof, multiple reticle options and incredible battery life. This sight is designed for operate through the toughest conditions. Features: Designed for modern MSR platforms and shotguns Comes standard with solid lens covers and 1/2 hex bolt mount Ballistic Circle-Dot reticle options Users can select from 4 different integrated reticle options (Dot, Circle-Dot, Dot with Holds, Circle-Dot with Holds) 100,000+ hour battery life and the readily available CR123A battery is side loading for quick battery replacement Unlimited eye relief to acquire aiming point and target, regardless of eye position behind sight MOTAC (Motion Activated Illumination) powers up or down when sensing motion Uses an ultra-efficient red LED illumination for daylight visibility and extended runtime 1.535" Mount Height Strong, lightweight aircraft-grade 6061-T6 aluminum housing Waterproof, IPX-7 rated, and fog-proof Removable Titanium Shroud for ultimate optic protection from drops and bumps Specifications: Color: Black Finish: Matte Fabric/Material: Aircraft Grade 7075-T6 Aluminum Magnification: 1 x Objective Lens Diameter: 38 mm Reticle: Ballistic Circle Dot Illumination Type: LED Illumination Color: Red Brightness Settings: 10 Eye Relief: Unlimited Adjustment Type: MOA Adjustment Click Value: 0.5 MOA Emitter Type: Enclosed Lens Material: Glass Optical Coating: HDX Battery Type: CR123 Battery Quantity: 1 Battery Life: 40000 hours Operating Temperature: -40 - 140 Fahrenheit Weather Resistance: Yes Water Resistance Level: IPX-8 Water Resistant Mark: 400 m Shockproof: Yes Fogproof: Yes Height: 2.5 in Weight1: 13.7 oz Included Accessories: Batteries, Lens Cloth, Lens Covers, Mount, Mounting Tool Condition: New Magnification Type: Fixed Attachment/Mount Type: Bolt W/E Travel at 100 Yds: 100 MOA