SIG Sauer ROMEO4S Red Dot Sight - 2 MOA Ballistic Circle Dot
Features
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2 MOA Dot with 65 MOA Ballistic Circle Reticle – Combines a precise central aiming point with a surrounding circle for quick target acquisition and holdovers.
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Hybrid Solar and CR2032 Battery System – Automatically draws power from ambient light and seamlessly switches to battery in low-light conditions, offering up to 100,000+ hours of runtime.
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MOTAC™ (Motion Activated Illumination) – Extends battery life by powering up on motion and shutting down when idle.
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12 Brightness Settings – Includes 10 daylight levels and 2 night-vision compatible settings for versatile use in all environments.
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Precision Adjustments – 0.5 MOA click adjustments with ±50 MOA of total windage and elevation travel.
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SpectraCoat™ Lens Coating – Anti-reflective coatings ensure maximum light transmission and clarity with minimal distortion.
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Rugged Design – CNC-machined 7075-T6 aluminum housing with integrated steel shroud provides exceptional durability.
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Waterproof and Fogproof – IPX‑7 rated for submersion up to 1 meter and nitrogen purged for fog resistance.
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Quick-Detach Mount System – Includes both co-witness and low-profile mounting options.
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Unlimited Eye Relief – Enables fast and flexible target acquisition across platforms.
Technical Specifications for SIG Sauer ROMEO4S Red Dot Sight - 2 MOA Ballistic Circle Dot
Specification
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Details
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Manufacturer
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SIG Sauer
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Model / MPN
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ROMEO4S / SOR43021
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SKU
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SOR43021
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UPC
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798681567867
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Magnification
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1×
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Objective Lens Diameter
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20 mm
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Reticle
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2 MOA Dot with 65 MOA Ballistic Circle
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Brightness Settings
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12 (10 daylight / 2 night-vision)
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Battery Type
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CR2032 with solar assist (side-loading)
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Battery Life
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Up to 100,000 hours
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Adjustment per Click
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0.5 MOA
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Windage / Elevation Range
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±50 MOA
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Eye Relief
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Unlimited
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Housing Material
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7075-T6 Aluminum with steel shroud
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Waterproof Rating
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IPX‑7 (submersible to 1 meter)
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Fogproof
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Yes – nitrogen purged
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Weight
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Approx. 7.6 oz (215 g)
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Mount Type
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Quick-detach co-witness and low mounts
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Finish
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Graphite / Matte Black
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Country of Origin
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USA
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Warranty
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Infinite Guarantee (housing); 5 years (electronics)
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Included Accessories
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SIG Sauer ROMEO4S 2 MOA Ballistic Circle Dot Sight
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Quick-Detach Mount with Co-Witness and Low Spacer
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CR2032 Battery (pre-installed)
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Clear Flip-Up Lens Covers
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User Manual
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Warranty Card
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