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Holosun - MRS Red Dot Sight (2 MOA, 20mm, Solar)



Time to gain the ability to quickly acquire a target. This is the Holosun HS503CU MRS (Multiple Reticle System) Red Dot Sight. It features a solar failsafe, so you never have to worry about getting a dead battery. It's got Holosun's "shake awake" feature, automatically activating the optic when it senses motion. And the multi-reticle system is perfect for getting the perfect sight picture and bead on your target. Multi-coated lenses keep the unit protected against direct impacts, and they reduce glare. The 2-MOA dot sits inside a wide 65-MOA circle with 12 brightness settings for day, night, and night vision, and Holosun’s Super LED sports a high-capacity CR2032 li-ion battery with up to 50,000 hours of battery life all on a single charge.

Solar Failsafe and "Smart" Brightness

The failsafe is exactly what it sounds like: an excellent battery back-up if your red dot's battery ever dies in the field. With a bit of light, the unit's waterproof and shock-proof solar panel, fixed atop the body, will recharge and keep your optic running so you never have to worry about trying to deal with back-up irons over a dead optic. And thanks to the solar panel, the HS503CU is considered a "smart" optic: An onboard sensor can automatically adjust brightness under any lighting conditions, no manual adjustments required.

Battle-Ready Aluminum Housing

The Holosun is made for all conditions, featuring a billet one-piece housing made from 6061-T6 anodized aluminum. The Holosun HS503CU MRS is completely sealed and waterproof, allowing it to run reliably in cold- and wet-weather environments.  

Additional Info:

  • IP67 waterproof rating with sealed lenses
  • 20mm micro reticle for compact operation
  • Up to 50,000 hours battery life (Setting 6)
  • 12 brightness settings: 10 Daylight & 2 Nightvision
  • Convenient tray battery compartment
  • Parallax-free with unlimited eye relief


  • Weight: 3.0 ounces
  • Lense diameter: 20mm
  • Height to center of reticle: 1.63"
  • Dimensions: 2.68"H x 2.48"L x 1.42"W
  • Reticle size: 2-MOA dot; 65-MOA circle
  • W&E Travel: +/- 50 MOA windage/elevation
  • Adjustments: 0.5 MOA per click

What's Included:

  • Lower 1/3 cowitness mount
  • Low profile mount
  • T10 L Key
  • Rubber cover
  • User manual
  • CR2032 battery
  • Lens cloth