Holosun HS503CU 2 MOA Circle Red Dot Sight

Manufactured by Holosun
Manufactured by Holosun
2 Reviews

In Stock

Standard orders will be shipped within the same business day. FFL orders will ship within 2 business days or less as long as we have the information for the transfer destination. Priority shipping methods like Overnight Delivery, Air Delivery, 2nd Day Delivery, or 3 Day delivery do not include Saturday or Sunday as delivery days.



The HS503CU Circle Dot is a compact red dot sight offering a 2 MOA dot or a 2 MOA dot with a 65 MOA circle reticle pattern. Employing new LED technology, the life time for one CR2032 battery can reach two years if left on constantly. However, the solar technology and automatic brightness features work together to extend the battery life dramatically beyond that for the average shooter. Featuring a housing design that shrouds the windage and elevation turrets on two sides. Perfect for shotguns, pistols, rifles, air rifles, and crossbows.

  • 2 MOA dot and 65 MOA Circle
  • Reduced training time and ammunition
  • Unlimited field of view
  • Parallax-free with unlimited eye relief
  • Durable and reliable construction
  • Low mount and 1/3 co-witness mount included
See More


Battery Life50000 Hours
Battery TypeCR2032 3V Lithium Coin
Brightness12 Settings
Click Value1/2 MOA
FinishPlasma Electrolytic Oxidation
MaterialAluminum - 6061-T6
Night Vision CompatibleNight Vision Compatible
Reticle65 MOA Circle 2 MOA Dot
Reticle ColorRed
Warrantylimited lifetime
Weight6.4 Oz.

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see www.p65warnings.ca.gov

Ratings & Reviews

2 reviews

  • 4 stars
  • 0 reviews
  • 3 stars
  • 0 reviews
  • 2 stars
  • 0 reviews
  • 1 star
  • 0 reviews

A red dot to end all red dots


This red dot delivers from every angle. The unlimited eye relief is amazing along with the glass. It’s super compact I. Size and adds practically no weight to my rifle at all. It adjusts to any light conditions and easily switches between battery and solar. Every one of my carbines will Be topped off with a holosun

Great features for the price!

by -

<br>1. Reticle
<br>2. Price
<br>3. Battery life
<br>1. A little too big.
<br>2. Special tool (mini screwdriver) needed to remove battery.
<br>3. China
<br>I want to dislike China but they did well with these products. Battery life, reticle design for this price is wonderful. Unit is a little big but I’m sure they will shrink them down in the coming years. Mounted this on my .22. Probably won’t have to change the battery for many years. Love the solar panel on top. Wish Trijicon and other US manufactures would up their game. Guess good old fashioned competition drives innovation and Holosun will force US manufactures to up their game, and I’ll be ready with my cash in hand.