The HS403B is a 20mm micro optical sight designed for rifle and carbine applications. Features include 12 brightness settings- 10 daylight & 2 night vision; Holosun's Red Super LED with up to 50k hours battery life; parallax free and unlimited eye relief; 2 MOA Dot. Includes lower 1/3 Co-witness mount, low profile mount, lens cloth, CR2032 battery, rubber cover, T10 L Key and user manual.
| Attribute | Value |
| Magnification | 1x |
| Objective | 20mm |
| Eye Relief | Unlimited |
| Dot Size | 2 MOA |
| Length | 2.45" |
| Weight | 2.82 oz |
| Finish | Black Anodized |
| Battery | CR2032 |
| Reticle | Red Dot |
| Adjustment Size | .50 MOA |
| Proofs | Impact/Weather Resistant/Waterproof |
| Optic Coating | Multi-Coated |
| Windage Elevation | Adjustable |
| Manufacturer Part Number | HS403B |
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