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    HS403B is a 20mm micro sight. HS403B features Holosun’s Red Super LED with 50k hour battery life, 10 daylight and 2 night vision compatible reticle intensity settings. Its housing is made from 6061 aluminum and includes both a lower 1/3 co-witness mount (1.63") and a low mount (.75"). Additional features include Shake Awake technology, digital buttons for setting changes, rubber lens covers, and a side-mounted battery tray for the 2032 battery. HS403B is a versatile sight for users of all levels.

    Key Features:

    • 2 MOA Dot Reticle
    • Up to 50,000 Hours Battery Life (Setting 6)
    • 12 Brightness Setting: 10 DL & 2 NV Compatible
    • Convenient Tray Battery Compartment
    • Parallax-free & Unlimited Eye Relief

    Holosun HS403B Micro Red Dot Optic (2 MOA) Sight Specifications:

    • Window Size: 20mm Diameter
    • Dimension (in): 2.45×1.43×1.6
    • Weight (oz): 2.82
    • Housing Material: 6061 T6 Aluminum
    • Surface Finish: MAO
    • Adjustment per Click: 0.5 MOA
    • W&E Travel Range: ±50 MOA
    • Storage Temperature: -40℃~70℃
    • Working Temperature: -30℃~60℃
    • Submersion: IP67
    • Vibration: 1000G