Review Contents

Intro: EPS Line Optics
Optics Comparisons
Detailed Comparisons
Range Testing


Intro: EPS Line Optics

Holosun’s latest offering is the Enclosed Pistol Sight, or EPS line, of red-dot sights. The EPS family is the first closed-emitter dots intended for compact conceal carry pistols. 

Two of the biggest trends in handguns right now are closed-emitter red dots and red dots for concealed carry, so Holosun is keeping pace with the industry. Up until now, most rugged, covered red dots were sized for larger, duty-style guns. But Holosun’s move makes sense given that concealed carry has been on the rise for a while, and it was only a matter of time until concealed carriers began wanting the advantages of red-dot sights. 

Optics are a trend that is, well, not really a trend anymore. They have earned their way on tons of concealed carry guns at this point. (Photo: Dave Luu/

The benefit of a closed-emitter optic is that the dot emitter is protected from the environment. This reduces the possibility that the emitter gets blocked by mud, debris, or water. If an open-emitter dot gets caked with mud, it might take considerable time and tools to clear the emitter. On the EPS, a wipe of the finger should clear it fine. Enclosing the optic should also reduce fogging issues with extreme temperature and humidity fluctuations.

On top of that, the EPS has the lowest height-over-bore distance of any enclosed optic to date. This should allow for the use of factory iron sights on most pistols, according to Holosun.

Holosun has become one of the top names in the red-dot arena by producing durable, dependable, feature-rich, and cost-effective options. There are two models of these new red dots, the EPS and the EPS Carry. Both the EPS and the EPS Carry are offered in separate versions with three different reticles available in either red or green.  

Holosun is also known for offering a solar option, which is a nice touch for guns that might be carried often and need a long life. (Photo: Dave Luu/

Options include:

  • 2-MOA dot (no solar)
  • 6-MOA dot (no solar)
  • Multi Reticle System (including Solar Failsafe)
    • 32-MOA ring with 2-MOA dot
    • 32-MOA ring only
    • 2-MOA dot only

To compare this to the other popular red dots in the Holosun line up, the EPS is the closed-emitter version of the 507c, and the EPS Carry is the closed emitter version of the 507k.  

Optics Comparisons

Here are some comparison dimensions from the factory. I also took a bunch of comparison photographs so you can see the differences, not only between the dots but also mounted on different slide widths.  

507k (open emitter for CCW)

Pistol Optic
The 507c, right, next to the EPS. (Photo: Dave Luu/
  • Window Size: 0.58x0.77 inches
  • Dimensions: 1.6x0.98x0.95 inches
  • Weight: 1 ounce

EPS Carry (closed emitter for CCW)

EPS Red Dot
The EPS dots both offer some extra protection for the dot itself. (Photo: Dave Luu/

Window Size: 0.58x0.77 inches
Dimensions: 1.62x1.07x0.95 inches
Weight: 1 ounce

EPS (closed emitter for CCW)

  • Window Size: 0.63x0.91 inches
  • Dimensions: 1.62x1.19x0.99 inches
  • Weight: 1.4 ounces

509T (open emitter for double-stack pistols)

  • Window Size: 0.66x0.9 inches
  • Dimensions: 1.6x1.16x1.13 inches
  • Weight: 1.72 ounces

Detailed Comparisons


Pistol Optic
The EPS, right, compared to the popular Romeo Zero. (Photo: Dave Luu/

Both the EPS and EPS Carry use the Holosun “K” mounting footprint. This footprint is almost identical to the Shield RMS/SMS mounting standard, which works with the Leupold Delta Point Pro, Sig Romeo Zero, and Swampfox Sentinel 1x16. The footprint is dimensionally smaller than others in the industry and usually used on CCW handguns with less slide real estate. Of course, adapter plates are available to mount the EPS on all the other major handgun footprints, so you should be able to use it on any pistol.

The EPS Carry looks best on single-stack guns with thin slides. The reduced width minimizes snag points for CCW. The EPS is a bit wider and more at home on thicker, double-stack guns. Although, you can still use the EPS on thinner guns if you don’t mind the overhang and/or prefer a larger window.

Other than these differences, the EPS line has all the usual Holosun features that have made the sights somewhat famous: 

  • Up to 50,000 hours of battery life
  • Parallax-free and unlimited eye relief
  • Multilayer reflective glass
  • Shake Awake technology with last-setting recall
  • 7075 T6 aluminum housing
  • Solar Failsafe
  • IPX8-certified waterproof
  • Exterior access battery door
  • Easy-push buttons

Range Testing


Despite the slight size difference, the shielded EPS dots concealed well and shot without much of a noticeable difference due to the size. (Photo: Dave Luu/

I was sent the EPS with the Multi Reticle System to test. I mounted it on my Staccato C2. The C2 is a double-stack gun, but it has a slim 1911-style slide. It basically felt and shot like my belove 507c, which was designed for double-stack guns. The glass shapes were a little different, and the EPS sits a tad lower. But the window sizes were basically the same. After a few rounds, I really did not notice the sealed emitter. 

I experienced no difference in dot tracking or follow-up shots. I also found there was no real difference in how the two optics carried when concealed. The enclosed housing of the EPS is a little bigger, but not in a perceivable way when tucked in your pants.

However, I also noticed the anti-fogging benefits. In the August humidity, the EPS fogged less than the 507c when going from air conditioning to outdoor summer conditions. I really liked the low bore mounting of the dot. The closer the actual dot is to the bore, the less offset you experience.

Another improvement I liked was the non-circular glass lens they used. The glass was noticeably clearer on the EPS than on my 507c. In addition, there was no distortion from edge to edge. There is a little bit of warping on the edges of my 507c.



With options fit for double-stack and single-stack pistol sizes, the EPS line offers some extra durability in a high-performing package. (Photo: Dave Luu/

Compared to the narrower windows of some designs, there was a definite difference in my ability to acquire the dot. It was easier with the larger opening of the EPS. This is especially important in unconventional shooting positions, such as when you are leaning to the side and have a cant in the orientation of the gun. When the gun is titled, it is more difficult to find the dot with recoil on a smaller windowed optic.

I also compared the EPS to a Trijicon SRO. I found the glass quality as good or even better. Of course, the window is larger on the SRO, but that really only comes out in the window height. The widow width is very similar between the two. And, of course, the EPS sits lower.

Overall, the EPS line is an excellent addition to the Holosun lineup. If you want a closed-emitter optic for your carry gun, the EPS and EPS Carry are a great option.

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