The HS503R is a 20mm micro sight designed for rifle and carbine applications. HS503R features a Rotary switch to select reticle intensity, Holosun’s Red Super LED with 50k hour battery life, and MRS (Multi-Reticle System) with 10 daylight and 2 night vision compatible reticle intensity settings.

The HS503R 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. Additional features include rubber lens covers, and a battery compartment integrated into the Rotary switch for the 2032 battery. HS503R is a versatile sight for users of all levels.

In the Box

• Lower 1/3 Cowitness Mount
• Low Profile Mount
• T10 L Key
• Rubber Cover
• User Manual
• CR2032 Battery
• Lens Cloth

Multiple Reticle System
Multi-reticle System (MRS) equipped Holosun optics allow you to determine the type of aiming point you want to use when you want to use it. Holosun optics equipped with MRS let you select a fast sight picture for shorter distances with a 65 MOA circle with 2 MOA dot (rifle optics) or a 32 MOA circle with 2 MOA dot (handgun optics). The large circle can help you obtain a sight picture faster, allows for a hold-over reference, and helps to guide your eye to the 2 MOA dot. The large ring can be deactivated leaving just the 2 MOA dot for an uncluttered sight picture and increased precision. Regardless of your application, Holosun’s Multi-reticle System offers the ultimate in optical sight customization for sportsman and professional users alike.

Multilayer Reflective Glass
Holosun’s use of Grade 5 Titanium in certain Elite category optics and laser devices results in unparalleled strength and durability. Holosun Grade 5 Titanium has more than double the tensile strength and has five-times the fatigue strength of 7075 Aluminum. Grade 5 Titanium is also able to withstand the corrosiveness of seawater making Holosun Titanium model optics and lasers suitable for use in maritime environments.

Features & Specifications

• MRS:2 MOA Dot; 2 MOA Dot & 65 MOA Circle
• Up to 100,000 Hours Battery Life (Setting 6)
• 12 Brightness Setting: 10 DL & 2 NV Compatible
• Rotary Battery Compartment
• Parallax-free & Unlimited Eye Relief
• PHYSICAL SPECS
  • Window Size: 20mm Diameter
  • Dimension (in): 2.73×1.53×1.61
  • Weight (oz): 3.74
• MECHANICAL SPECS
  • Housing Material: 6061 T6 Aluminum
  • Surface Finish: MAO
  • Adjustment per Click: 0.5 MOA
  • W&E Travel Range: ±50 MOA
• ENVIRONMENT SPECS
  • Storage Temperature: -40℃~70℃
  • Working Temperature: -30℃~60℃
  • Submersion: IP67
  • Vibration: 1000G