---
product_id: 28163104
title: "HE403B-GR / HS403B 2 MOA Dot Micro Sight for Rifles - Shake-Awake Super LED Durable Waterproof Aluminum Sight with Multilayer Reflective Glass & 12 Brightness Settings - Red/Green Dot Options"
brand: "holosun"
price: "HK$1865"
currency: HKD
in_stock: true
url: https://www.desertcart.hk/products/28163104-he403b-gr-hs403b-2-moa-dot-micro-sight-for-rifles
store_origin: HK
region: Hong Kong
---

# 12 brightness settings with red/green dots Waterproof & durable aluminum 50,000 hrs battery life HE403B-GR / HS403B 2 MOA Dot Micro Sight for Rifles - Shake-Awake Super LED Durable Waterproof Aluminum Sight with Multilayer Reflective Glass & 12 Brightness Settings - Red/Green Dot Options

**Brand:** holosun
**Price:** HK$1865
**Availability:** ✅ In Stock

## Summary

> 🎯 Lock in your edge with Holosun’s unstoppable micro sight!

## Quick Answers

- **What is this?** HE403B-GR / HS403B 2 MOA Dot Micro Sight for Rifles - Shake-Awake Super LED Durable Waterproof Aluminum Sight with Multilayer Reflective Glass & 12 Brightness Settings - Red/Green Dot Options by holosun
- **How much does it cost?** HK$1865 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/28163104-he403b-gr-hs403b-2-moa-dot-micro-sight-for-rifles)

## Best For

- holosun enthusiasts

## Why This Product

- Trusted holosun brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Rugged & Ready:** 6061 T6 aluminum housing built to withstand the harshest environments with waterproof reliability.
- • **Versatile Mounting Options:** Includes both 1/3 co-witness and low mounts for seamless integration on any rifle setup.
- • **Tailored Brightness Control:** 12 reticle intensity settings including night vision modes for ultimate adaptability.
- • **Unmatched Battery Longevity:** Up to 50,000 hours with Shake Awake tech—never miss a shot due to power loss.
- • **Precision Optics for Every Condition:** Multilayer reflective glass ensures crystal-clear clarity and glare reduction.

## Overview

The HOLOSUN HE403B-GR is a cutting-edge 20mm micro red dot sight designed for rifles and carbines, featuring an ultra-efficient 650nm Super LED with up to 50,000 hours of battery life. Its Shake Awake technology conserves power by deactivating the LED when idle, instantly reactivating on movement. Built with durable 6061 T6 aluminum and multilayer reflective glass, it offers superior clarity, reduced glare, and 12 brightness settings including night vision modes. With versatile mounting options and a rugged waterproof design, this sight delivers precision and reliability for professional shooters and enthusiasts alike.

## Description

HOLOSUN HE403B-GR / HS403B 2 MOA Dot Micro Sight for Rifles - Shake-Awake Super LED Durable Waterproof Aluminum Sight with Multilayer Reflective Glass & 12 Brightness Settings - Red/Green Dot Options

## Features

- HOLOSUN RED DOT SIGHT - HS403B is a 20mm micro sight designed for rifle and carbine applications; It features Holosun's ultra efficient 650nm Red Super LED with up to 50k hour battery life and 12 reticle intensity settings; The housing is made from 6061 aluminum and includes both a lower 1/3 co-witness mount (1.63") and a low mount (.75") for low-comb height rifle applications; Lens cloth, rubber lens cover, T10 L key, and CR2032 battery included
- SHAKE AWAKE TECHNOLOGY - Extends battery life by deactivating the optic's LED while not in use; Shake Awake offers settings from 10 minutes to 12 hours depending on the model and can be deactivated altogether if preferred; The slightest touch of the optic instantly reactivates the LED so your Holosun sight for rifle is ready when needed
- MULTILAYER REFLECTIVE GLASS - This red dot sight for rifle is manufactured using optical-quality glass lenses with multilayer coatings applied to facilitate maximum light transmission and wear resistance while reducing glare and facilitating reduced power requirements; Holosun's highly reflective coatings produce industry-leading reticle intensity, clarity, and battery efficiency
- SUPER LED - This micro sight for rifle is equipped with Holosun Super LED technology that provides a versatile range of reticle intensity settings; Holosun Super LEDs have ultra-efficient power usage creating battery like as high as 50,000 hours
- SPECIFICATION - Reticle: Red 2 MOA; Light Wavelength: 650nm; Magnification: 1x; Parallax Free & Unlimited Eye Relief; Power Source: Solar & Battery; Battery Type: CR2032; Battery Life (Hours): 50000; Brightness Setting: 10 DL & 2 NV; Window Size: 20mm Diameter; Housing Material: 6061 T6 Aluminum; Adjustment per Click: 0.5 MOA; W&E Travel Range: ±50 MOA; Black Finish

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | HOLOSUN |
| Color | Black |
| Style | Red 2 MOA Dot |
| Sport | Hunting |
| Item Weight | 0.27 Pounds |
| Material | Aluminum |
| Magnification Maximum | 1 x |
| Objective Lens Diameter | 20 Millimeters |
| Magnification Minimum | 1 x |
| Compatible Devices | Rifle |
| Mounting Type | Picatinny Mount |
| Night vision | Yes |
| Model Name | HS403B |
| Manufacturer | Holosun |
| Reticle Type | Single Dot |
| UPC | 760921087428 |
| Global Trade Identification Number | 00760921087428 |
| Item Package Dimensions L x W x H | 4.72 x 3.66 x 3.11 inches |
| Package Weight | 0.34 Kilograms |
| Item Dimensions  LxWxH | 6 x 6 x 4 inches |
| Brand Name | HOLOSUN |
| Country of Origin | China |
| Warranty Description | 2 Year Manufacturer |
| Suggested Users | unisex-adult |
| Number of Items | 1 |
| Part Number | HS403B |
| Included Components | Product |
| Size | 2MOA Dot |

## Product Details

- **Brand:** HOLOSUN
- **Color:** Black
- **Style:** Red 2 MOA Dot
- **Sport:** Hunting
- **Item Weight:** 0.27 Pounds
- **Material:** Aluminum
- **Magnification Maximum:** 1 x
- **Objective Lens Diameter:** 20 Millimeters
- **Magnification Minimum:** 1 x
- **Compatible Devices:** Rifle

## Images

![HE403B-GR / HS403B 2 MOA Dot Micro Sight for Rifles - Shake-Awake Super LED Durable Waterproof Aluminum Sight with Multilayer Reflective Glass & 12 Brightness Settings - Red/Green Dot Options - Image 1](https://m.media-amazon.com/images/I/51EE-VWJ2ZL.jpg)

## Available Options

This product comes in different **Color, Style** options.

## Questions & Answers

**Q: Will this cowitness with my a2 front post? I don't mean a lower 3rd cowitness**
A: No, not with the mount the optic ships with.  It is compatible with Aimpoint T1 mounts, so full cowitness it definitely possible.

**Q: Does this include the high rise mount AND a low base?**
A: The HS403B comes with a high mount (lower 1/3 co-witness on standard AR sights) and a low mount.We are an AUTHORIZED distributor and the above answer came directly from HOLOSUN USA . Hope that helps !

**Q: Does this have the acss reticle, or just a dot?**
A: Just a dot.

**Q: Does this pair with the holoson hm3x magnifier? any special parts or spacers needed?**
A: It should, but you can always call holosun... it’s free.

## Frequently Bought Together

- HOLOSUN HE403B-GR / HS403B 2 MOA Dot Micro Sight for Rifles - Shake-Awake Super LED Durable Waterproof Aluminum Sight with Multilayer Reflective Glass & 12 Brightness Settings - Red/Green Dot Options
- Streamlight 88066 ProTac Rail Mount HL-X 1000-Lumen Multi-Fuel Weapon Light with Remote Switch, Tail Switch, Clips, and CR123A Batteries, Box, Black
- HOLOSUN HM3X 3X Flip-to-Side Magnifier w/QD Mount HM3X

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.hk/products/28163104-he403b-gr-hs403b-2-moa-dot-micro-sight-for-rifles](https://www.desertcart.hk/products/28163104-he403b-gr-hs403b-2-moa-dot-micro-sight-for-rifles)

---

*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-03-03*