Holosun HS403R Micro Red Dot Sight – 2 MOA | Rotary Dial | 100K Hour Battery

Important Note
This optic is designed for rifle and carbine platforms with compatible mounting rails. The HS403R includes both a low mount and a lower 1/3 co-witness mount for flexible installation.

Overview

The Holosun HS403R Micro Red Dot Sight is a compact optic designed for rifles and carbines, delivering fast target acquisition and long-lasting performance. Featuring a 2 MOA precision red dot, a durable aluminum housing, and a rotary brightness dial, the HS403R provides simple operation and dependable reliability.

Powered by Holosun’s Super LED technology, the optic offers up to 100,000 hours of battery life on a single CR2032 battery while maintaining a bright, clear aiming point in varying lighting conditions.

Key Features

• 2 MOA Precision Red Dot – Clear aiming point for improved accuracy and quick target acquisition.

• Rotary Brightness Dial – Easy-to-use dial allows fast brightness adjustments.

• Holosun Super LED Technology – Provides up to 100,000 hours of battery life.

• 12 Brightness Settings – Includes 10 daylight settings and 2 night vision compatible settings.

• Dual Mounting Options – Includes lower 1/3 co-witness mount (1.63") and low-profile mount (.75").

• Durable Aluminum Housing – Built to withstand recoil and field conditions.

• Side Battery Compartment – Battery compartment integrated into the rotary dial for convenient CR2032 battery replacement.

• Multi-Coated Lens – Improves light transmission and reduces glare.

Product Description

The Holosun HS403R Micro Red Dot Sight is engineered to provide reliable aiming performance in a compact, lightweight optic. The 2 MOA red dot reticle offers precision while maintaining rapid target acquisition for both range shooting and defensive applications.

A rotary brightness dial allows shooters to quickly adjust brightness levels without navigating push-button controls. With 10 daylight brightness settings and 2 night vision compatible settings, the optic adapts easily to a variety of lighting environments.

Constructed from durable aluminum and finished with Holosun’s Micro Arc Oxidation (MAO) surface treatment, the HS403R is built to withstand recoil and harsh environmental conditions. Its included mounting options allow users to configure the optic for either lower 1/3 co-witness or low-profile mounting on rifles and carbines.

Included in the Box

• Lower 1/3 Co-Witness Mount (1.63")
• Low Profile Mount (.75")
• T10 L Key
• Rubber Lens Cover
• CR2032 Battery
• User Manual
• Lens Cloth

Optical Specifications

• Reticle: 2 MOA Dot
• Light Wavelength: 650 nm
• Reticle Color: Red
• Magnification: 1x
• Eye Relief: Unlimited
• Parallax: Parallax-free
• Lens Coating: Multi-coated

Electronic Specifications

• Power Source: Battery
• Battery Type: CR2032
• Battery Life: Up to 100,000 hours
• Brightness Settings: 10 daylight / 2 night vision

Physical Specifications

• Window Size: 20mm diameter
• Dimensions: 2.75 × 1.43 × 1.62 in
• Weight: 3.53 oz

Mechanical Specifications

• Housing Material: Durable Aluminum
• Surface Finish: MAO (Micro Arc Oxidation)
• Adjustment Per Click: 0.5 MOA
• Windage & Elevation Range: ±50 MOA

Environmental Specifications

• Water Resistance: IP67
• Vibration Resistance: 1000G
• Operating Temperature: -30°C to 60°C
• Storage Temperature: -40°C to 70°C

Specifications Summary

• Brand: Holosun
• Model: HS403R
• Article Number: HS403R
• UPC: 605930625295
• Product Type: Micro Red Dot Sight
• Reticle: 2 MOA Red Dot
• Battery Type: CR2032
• Battery Life: Up to 100,000 hours
• Mount Options: Low Mount & Lower 1/3 Co-Witness