Holosun HS403B-FDE Parallax Free Red Dot Sight 2019

  • Shipping Weight: 0.389kgs
  • 0 Units in Stock
  • Manufactured by: HOLOSUN


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NEW Flat Dark Earth color for 2019!

The HS403B is the updated version of the very popular HS403A, now features a slide-out battery tray and compatible with industry standard Micro T1 mounts
Awesome new low profile red dot for airsoft and real steel shooting
Features up/down brightness adjustment buttons on top, "Shake Awake" auto power on feature , parallax-free, durable finish, and an amazing 50,000 hour runtime on a single battery (read below for full details)
Windage and elevation adjustment dials with protective caps, caps can be used to turn the dials
Package includes: HS403B Red Dot, One Piece Rubber Lens Covers, Low profile mount, and see-through high mount, owner's manual, tools, lens cleaning cloth, 1X CR2032 Lithium battery

NOTE: compatible with GunsModify T1 Lens Protector

For your convenience, download and print zeroing target here: Download


Part No. HS403B-FDE
Principle Reflex collimator sight - red dot sight


Light source LED (Light Emitting Diode) totally eye-safe wavelength: 650 nm red light
Red Dot Size 2 MOA -- 1 minute of angle = 30mm at 100 meters / 1.04 inch at 100 yards
Parallax free: No centering required, aiming with red dot anywhere inside window.
Eye Relief Unlimited
Night Vision 3 brightness setting for night vision, Setting 1, 2, 3 is for night vision, From setting 4 to 9 are day time setting from dim to bright.
Coating Multi-layer coating for all lens.
Magnification 1X


Battery CR2032
Battery Life 50,000 hours. Based on brightness setting 6. current is 5uA(micro Ampere). the battery capacity is 250mAHour. 250mAHoursX1000/5uA=50,000 hours
Auto Shutoff 8 Hours. After sight turn on 8 hours, it will automatically shutoff.
Settings 12 brightness setting include 3 night vision setting from 1 2 3. all setting current reading(from 12 to 1) 179uA 36uA 22uA 13.1uA 8.8uA 5.91uA 4.92uA 4.53uA 4.25uA 4.13uA 4.06uA 4.02uA


Housing Material Aluminum
Housing Finish PEO/MAO housing finish: Plasma electrolytic oxidation (PEO), also known as microarc oxidation (MAO), is an electrochemical surface treatment process for generating oxide coatings on metals. It is similar to anodizing, but it employs higher potentials, so that discharges[1] occur and the resulting plasma modifies the structure of the oxide layer. This process can be used to grow thick (tens or hundreds of micrometers), largely crystalline, oxide coatings on metals such as aluminium, magnesium and titanium. Because they can present high hardness[2] and a continuous barrier, these coatings can offer protection against wear, corrosion or heat as well as electrical insulation.
Housing Color Black


Storage Temperature -40C to 70C
Working Temperature -10C to 50C
Radioactive None.

Dimension 133X54X72mm
Without mount 76g (2.7 oz)
With low profile mount 94g (3.3 oz)
With 1/3 mount 120g (4.2 oz)

Limited Lifetime Warranty by Manufacturer
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