Review EOTech EXPS3 Holographic Sight [Field Grade Optic]

eotech exps3 pov 1

There are tons of EOTech EXPS3 sight reviews out there, but this one is slightly different.

We are going to check out its specs, tons of pictures and point out some unobvious things to give you the best information available.

Let's check it out

Core Specs

  • Magnification - 1X
  • Reticle - 1 MOA + 68 MOA Ring (68 VS 65 MOA? Learn more here)
  • Adjustment - 0.5 MOA / Click
  • Brightness - 20 DL & 10 NV
  • Battery Life - 50,000 hrs / 20,000 hrs circle dot
  • Lens Material - 1/8" solid glass(Front) 3/16" Laminate (Rear)
  • Construction - Aerospace Grade Aluminum
  • Submersion - IP67
  • Body Dimension -3.8" X 2.3" X 2.9"
  • Window Size - 1.26" X 0.91"
  • Weight - 11.2 oz

  • Unboxing

    Eotech exps3 box
    eotech exps3 box back side
    EOTech unboxing
    EOTECH exps3 tan unboxing

    You get:

    • Manual
    • Stickers
    • Plastic Carrying Case /w Foam
    • LE Support Welcome Card
    • 1 CR2032 Battery

    First Impression

    Eotech exps 3 tan on mk18

    The EOTECH EXPS3 is DEFINITELY a high end optic still to this day, No doubt! 

    It's the face of the optics world in many ways.

    eotech exps3 on scar 17s

    The EOTECH series holographic sight is one of the most iconic piece of gun accessories presented in the real world military, movies, TV shows and video games.

    mk18 muzzle brake at night
    kriss vector with eotech exps3 tan

    Now we have one in our hands to play around with, it really makes people feel a bad ass and be apart of the culture

    All I can say is: it's a very rock solid product just by picking it up for the first time.

    Very nice packaging

    Tight tolerance

    Very high end coating finish

    Now let's go in depth and see how this thing performs and how it compares to some of the top dogs like EOTech EXPS3 and Leupold LCO.

    Core Features

    Window Size

    eotech reticle bright sunny day with snow reflection
    eotech exps3 in the dark

    The window size of the EOTECH EXPS3 is as big as an EOTech. Once the optic is mounted on a long gun, I never once got the impression that the window is too small for me to aim.

    It has a large field of view and it helps shooters get on target fast and maximizes situational awareness. The ideal optic to eye distance with the Holosun 510C is similar to any other optics as long as it feels comfortable to the shooter.


    68 reticle in action
    EOTECH exps3 reticle outdoor
    eotech exps 3 vortex micro 3x flipped

    The EOTECH EXP3 series holosights offers a 3 reticle systems that serves shooters with long range aiming and BDC capabilities, but only for specific EXP3 models.

    Meaning you can't cycle through 3 reticles using one optic, so you have to buy that specific one you want.

    eotech 68 MOA ring reticle range estimation human size target

    The 1 MOA center dot with a 68 MOA ring around it is for fast combat target acquisition and precise aiming point for long range engagement without covering up too much of a standard size target.

    If you have bad eye sights, I recommend pairing the EOTECH EXPS3 with a magnifier scope to zoom in on the target and also crystalize the reticle clarity for a better aim.

    Available Reticle Options

    68 MOA ring reticle BDC dots

    Different reticle options have different model numbers:

    So it will be something like Eotech EXPS3-2

    • -0 [1 MOA dot]
    • -2 [2 BDC dots]
    • -4 [4 BDC dots]

    Reticle Clarity & Brightness Settings

    cloud defensive rein and eotech 68 moa reticle

    Most shooters out there have astigmatism will look through this optic and see starburst, blurry or smeared reticle reflected on the glass from the emitter.

    This is NOT the sight's issue, instead is due to your eye condition.

    The images we are showing only represents a perfect reticle a digital camera sees, but not your eyes.

    For this review, I worn corrected lens and I also used my camera to check the clarity of the reticle. The result is that the reticle is very crisp, and if there is anything that looks blurry I had to blame my eyesight.

    eotech exps3 blurry reticle

    Try this fixes for astigmatism 

    • Adjust the brightness setting
    • Wear corrected lens
    • Cowitness the reticle through the rear iron sight peep hole

    However, if none of these techniques have worked for you in the past, we highly recommend checking out a Prism sight for shooters with astigmatism.

    Parallax Performance

    eotech exps3 aiming steel target
    eotech 45 degree leaning left

    Learn more if you're interested: Optic cant effect on point of impact

    A parallax free reflex sight is something companies often market to the users, but...

    No optic is 100% completely parallax free

    Generally the parallax shift is more noticeable when aiming at a target close up, and there is no better way to explain this than to show you below:

    Battery Life

    eotech exps 3 battery access

    The battery life on the EOTech EXPS3 is only under 1,000 continuous hours at nominal setting 12 at room temperature using 1 CR123A battery. In the world of 50,000+ hrs red dot / holosight market, the EOTech EXPS3 falls short in this department.

    However, If you turn on/adjust the optic with the down arrow brightness setting, the auto shut off is 4 hours. The 8/4 hour shut off is toggled by the last push button used. And resets once a button is pressed.

    eotech exps 3 battery access open

    When the battery is running low or if the battery access cap isn't screwed on tight, the reticle will flash to get the user's attention for troubleshooting.


    bad ass MK18 regular guy setup

    The construction of the Holosun 510C is rock solid. 

    You can view as many images online as possible, but once you hold one in your hands close up, you will very quickly realize this thing is something you want to keep even if you've planned to return it.

    eotech exps3 in rain

    Referenced PewPewTactical

    The optic glass and emitter are fully protected to prevent anything shifts from recoil and hard drop to meet the mil-spec requirement.

    The front 1/8" solid glass lens and 3/16" laminate rear glass to give the user the best durability.

    In addition, the optic is extra protected by a lens hood that goes over the optic for drop and bump protection. 


    The EOTech EXPS3 comes with a quick release integrated mount for fast optic attachment and detachment.

    eotech exps 3 bottom

    In the case the user move optic from one receiver to another with a loose fit, the adjustable QD tension screw provides a rock solid installation in order to hold zero and prevent the optic from falling off the rifle.

    The zero repeatability based on our field testing gives us confidence. We on and off the optic on different rail slots and the zero is retained while using a magnifier.

    (We zeroed the optic at 100 yards before testing)

    There were tons of drop & torture tests done on the EOTech, so you can check them out here.

    We have seen what it can do and we want to keep it intact. 

    eotech exps 3 vortex micro 3x flipped

    Works with all magnifier scopes

    The mount sits just at 1/3 co-witness height, which works for most shooter providing the best cheek weld height.

    If the shooter still felt the optic mount height is short, we recommend using a mount riser to lift the optic up when using night vision goggles or other cheek weld issues.


    EoTECH elevation and windage adjustment

    The EOTECH EXPS3 features 0.5 MOA/click elevation and windage adjustment knobs, and both knobs can be easily adjusted with a flat head screw driver, a coin or a shell casing.

    The click gives positive feedback so there shouldn't be any guessing whether you've dialed a click or over dialed without even noticing. The tiny ball detent makes the each click very positive.

    The windage turret felt more positive feedback than the elevation based on my experience with this particular unit.

    Note: Turret direction references the point of impact, NOT point of aim.

    Click here to learn more - Which way to adjust scope turrets

    eotech moa adjustment knob

    Color Options

    The EOTech EXPS3 is available in:

    • Black
    • Tan

    To Buy Or Not To Buy?

    If you're looking for a high quality red dot sights for one of your favorite rifles, the EOTech EXPS3 is by far one of the best, so saving up for it is worth.

    This is the predecessor sighting system that many optics today are trying to replicate and inspire new designs from it.

    You get the durability and great aiming capability, great tactical aesthetics, undeniable real world combat performance track record.  

    Overall, The EOTech holographic sight is like the face of the optics world. Anywhere professional shooters hang around, you see will see someone with an EOTECH. 


    • Rock solid construction, no doubt
    • Big viewing window
    • Most iconic optic aesthetics
    • QD lever mount with locking feature & adjustable tension screw
    • 3 reticles to pick from
    • Night vision capable 
    • Mil-spec grade quality from the top to bottom


    • Expensive
    • Short battery life
    • Can't cycle through different reticles
    • 11 oz weight (not too heavy on a light rifle)

    Ying Xu

    US Air Force veteran nuclear weapon officer. Aerospace engineering bachelor's degree from the University of Kansas. Experienced as a certified NRA range safety officer. Working as a search engine expert for