The HS503R is a small compact micro red dot optic that features Holosun’s new Rheostat Dial to adjust brightness settings. Employing our LED technology, The HS503R can achieve “constant on” battery life of up to 100,000 hours on medium setting. This optic features Holosun’s proprietary Multi-reticle System (MRS) giving the user 2 reticles to choose from.
New rotary control for faster operation and visual brightness indicator • Advanced technology LED allows up to 100,000 hours of operation on one CR2032 battery
Unlimited field of view
Parallax-free with unlimited eye relief
Durable and reliable construction
Low mount and 1/3 Co-witness mount included
OPTICAL DATA
Light Source: LED
Reticle: 2MOA Dot & 65MOA Ring
Parallax Free: Yes
Unlimited Eye Relief: Yes
Magnification: 1x
Multi-Coatings : Yes
Integrated Laser : No
ELECTRONIC DATA
Battery Type: CR2032
Battery Life: Up to 100,000 Hours
Brightness Setting: 10 Daylight & 2 NV Compatible
MECHANICAL DATA
Housing Material: Aluminum
Surface Finish: MAO
Housing Color: Black
Adjustment per Click: 0.5 MOA
W&E Travel Range: ±50 MOA
Storage Temperature: -40F - 158F
Working Temperature: -22F - 140F
Submersion: IP67
Vibration: Up to 1000G
PHYSICAL DATA
Window Size: 20mm Diameter
Dimension (in): 2.75x1.43x1.62
Weight (oz): 3.74
Central Height (in): 1.63 
