Holosun HS503R 2 MOA & 65 MOA Cicle Red Dot Sight with Rotary Switch
The HS503R boasts Holosun’s innovative Multi-Reticle System (MRS), offering shooters the choice between a precise 2 MOA dot, a 65 MOA circle, or a combination of both. This flexibility allows for quick target acquisition and adaptability to different shooting conditions. The sight is equipped with 10 brightness settings for daylight and 2 settings for night vision compatibility, ensuring clear visibility in all lighting environments. Its multilayer reflective glass enhances the clarity and sharpness of the sight picture, providing an excellent visual experience.
A standout feature of the HS503R is its remarkable battery life, powered by a single CR2032 battery. The sight can operate up to 100,000 hours on setting 6, thanks to its efficient power management system. The battery is housed in a user-friendly rotary compartment, allowing for quick and tool-free replacement. Additionally, the sight utilizes a rotary switch for easy adjustment of reticle brightness, ensuring rapid and precise control.
This red dot sight is designed with a parallax-free optical system and unlimited eye relief, allowing for rapid target acquisition and accurate shooting without the need for perfect eye alignment. It is IP67 rated, providing waterproof and dustproof performance to withstand harsh environmental conditions. Compact and lightweight, the HS503R features a 20mm window size and weighs only 3.74 ounces, making it an ideal choice for a variety of firearms.
The HS503R also includes both a lower 1/3 co-witness mount (1.63”) and a low mount (.75”), providing shooters with versatile mounting options to suit their preferences and shooting styles.
Dimension (in): 2.73×1.53×1.61
Weight (oz): 3.74
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
Made from durable 6061 aluminum.
Lightweight (3.74 ounces) and robust design for longevity.
Rubber lens covers for optic protection against damage and debris.
Reticle System:
Holosun’s Multi-Reticle System (MRS) offers versatile aiming options.
Includes a 2 MOA dot, a 65 MOA circle, and a combination of both.
Facilitates quick target acquisition and adapts to various shooting conditions.
Brightness Settings and Optics:
10 daylight brightness settings.
2 settings for night vision compatibility.
Multilayer reflective glass enhances clarity and sharpness of the sight picture.
Battery Life and Management:
Powered by a single CR2032 battery.
Long battery life up to 100,000 hours on setting 6.
Rotary battery compartment allows for easy and tool-free replacement.
User-Friendly Features:
Rotary switch for simple adjustment of reticle brightness.
Parallax-free optical system with unlimited eye relief for rapid target acquisition.
Designed for accurate shooting without perfect eye alignment.
Environmental Durability:
IP67 rated for waterproof and dustproof performance.
Withstands harsh environmental conditions.
Compact and Mounting Options:
Compact design with a 20mm window size.
Includes a lower 1/3 co-witness mount (1.63”) and a low mount (.75”).
Versatile mounting options cater to different shooting preferences and styles.
- Lower 1/3 Cowitness Mount
- Low Profile Mount
- T10 L Key
- Rubber Cover
- User Manual
- CR2032 Battery
- Lens Cloth
- Holosun 10 years / product lifetime warranty. Read more here


