If you're looking for a compact enclosed pistol red dot, two great options from Holosun are the Holosun AEMS-MICRO and the Holosun EPS Carry. Both are designed for concealed carry pistols and share many of Holosun's most popular features, but there are some important differences between them.
The AEMS-MICRO is the newer optic, featuring a taller square viewing window, a forward-facing light sensor, and up to 100,000 hours of battery life. The EPS Carry, on the other hand, has a much lower deck height, allowing it to co-witness with factory-height iron sights on many pistols. It's also significantly lighter and more compact.
So which one is better? In this article, we're comparing the Holosun AEMS-MICRO vs. EPS Carry to cover their window sizes, footprints, battery life, brightness features, and mounting heights to help you choose the right optic for your pistol.
|
Holosun AEMS-MICRO 
|
Holosun EPS Carry 
|
Holosun AEMS-MICRO vs EPS Carry Specifications
Before diving into the differences, let's take a quick look at how these two optics compare on paper.
| Specification | AEMS-MICRO | EPS Carry |
|---|---|---|
| Window Size | 0.71" × 0.71" | 0.77" × 0.58" |
| Weight | 2.1 oz | 1.23 oz |
| Mounting Footprint | Modified ACRO / Included RMSc Adapter | Holosun K / Included RMSc Adapter |
| Battery Life | Up to 100,000 Hours | Up to 50,000 Hours |
| Battery Type | CR1620 | CR1620 |
| Forward Light Sensor | Yes | No |
| Factory Iron Co-Witness | No | Yes on Many Pistols |
| Housing Material | 7075-T6 Aluminum | 7075-T6 Aluminum |
| Waterproof Rating | IPX8 | IPX8 |
AEMS-MICRO vs EPS Carry Window Size
One of the biggest differences between these two optics is the viewing window.
The Holosun EPS Carry has a rectangular window measuring 0.77" wide × 0.58" tall. This is a fairly traditional window shape for a compact enclosed pistol optic.
The AEMS-MICRO takes a different approach, using a 0.71" × 0.71" square window. While the EPS Carry is slightly wider, the AEMS-MICRO is noticeably taller.
In fact, the AEMS-MICRO offers approximately 22% more vertical window height and about 13% more rectangular viewing area overall compared to the EPS Carry.
Why Does a Taller Window Matter?
When shooting a pistol with a red dot, one of the biggest challenges is tracking your reticle during recoil.
As the pistol recoils, the muzzle rises and the dot can temporarily move outside the viewing window. This is especially noticeable on smaller concealed carry pistols, which can be more difficult to control during rapid strings of fire.
A taller viewing window gives you more vertical space to track the dot throughout the recoil cycle. This can make it easier to keep track of your reticle as the pistol returns to target.
Of course, a taller window doesn't automatically make you a better shooter. Proper grip and recoil control are still extremely important. However, having additional viewing space can certainly be beneficial, especially if you're someone who occasionally loses your dot during recoil.
Our takeaway: If your priority is having more vertical viewing space to help track your dot, the AEMS-MICRO has the advantage. If you're comfortable with a smaller window and prioritize keeping your optic compact, the EPS Carry is still an excellent choice.
AEMS-MICRO vs EPS Carry Footprint
Another important difference between these optics is their mounting footprint. While both can work on many popular compact and subcompact pistols, they use very different mounting systems.
Holosun EPS Carry Footprint
The EPS Carry uses Holosun's K footprint, which is a modified version of the RMSc footprint. This is the same mounting pattern used by popular optics like the Holosun 407K and 507K.
On pistols with a compatible K-cut slide, the EPS Carry can mount directly to the slide without an adapter plate.
The EPS Carry also includes an RMSc-to-K adapter plate, allowing it to mount onto many RMSc-cut slides.
Holosun AEMS-MICRO Footprint
The AEMS-MICRO uses a modified ACRO-style clamping interface rather than the traditional screw-through mounting system found on the EPS Carry.
The optic is designed to work with compatible ACRO-cut slides and adapter plates. Because the AEMS-MICRO is shorter from front to back than a traditional ACRO optic, it also includes a front spacer to fill the additional space in a compatible ACRO mounting cut.
However, every AEMS-MICRO also includes an RMSc adapter plate, allowing it to mount onto compatible RMSc-cut slides.
This is useful because the RMSc footprint is commonly found on compact and subcompact concealed carry pistols like the Glock 43X MOS, Glock 48 MOS, and Springfield Hellcat OSP.
It's important to understand that the AEMS-MICRO itself is not a direct-mount RMSc optic. The included adapter plate provides that compatibility.
Our takeaway: The EPS Carry has the advantage if you want to direct-mount your optic onto a compatible Holosun K-cut slide. The AEMS-MICRO offers mounting flexibility through its modified ACRO-style interface and included RMSc adapter plate. Always confirm compatibility with your specific slide, plate, and mounting hardware.
EPS Carry vs AEMS-MICRO Deck Height and Iron Sight Co-Witness
This is another major difference between the two optics, and one that we think deserves more attention.
The Holosun EPS Carry has an extremely low deck height, meaning the bottom of the viewing window sits relatively close to the mounting surface of your slide.
This allows the EPS Carry to co-witness with factory-height iron sights on many popular pistols, especially when the optic is mounted directly onto a compatible slide without an additional adapter plate.
That's a huge advantage for concealed carry. You may be able to keep your existing iron sights and still have them visible through the optic's window as a backup sighting system.
The AEMS-MICRO is a different story.
Because of its taller housing and mounting interface, the AEMS-MICRO has a substantially higher deck height. On typical compact pistol setups, factory-height iron sights will not be tall enough to co-witness through its window.
If co-witnessing iron sights is important to you, the AEMS-MICRO will generally require much taller aftermarket sights, assuming a suitable combination is available for your pistol.
Exact co-witness compatibility always depends on the pistol, optic cut, mounting plate, and iron sight height.
Our takeaway: The EPS Carry is the clear winner when it comes to low deck height and factory iron sight compatibility. If you want to retain your factory-height iron sights, the EPS Carry is probably the better choice.
AEMS-MICRO vs EPS Carry Battery Life
Both optics use a side-loading CR1620 battery, meaning you can replace the battery without removing the optic from your pistol.
However, the AEMS-MICRO has a significant advantage when it comes to its advertised battery life.
- AEMS-MICRO: Up to 100,000 hours of battery life.
- EPS Carry: Up to 50,000 hours of battery life.
On paper, the AEMS-MICRO offers twice the maximum rated battery life of the EPS Carry.
Now, 50,000 hours is already excellent battery life for a pistol red dot, so we wouldn't consider the EPS Carry's battery life a weakness. However, the additional battery life of the AEMS-MICRO is certainly a nice advantage.
Both optics also feature Holosun's Shake Awake technology, which helps conserve battery power by deactivating the reticle when the optic is stationary and reactivating it when movement is detected.
Actual battery life will depend on brightness settings, reticle configuration, and usage, so the published numbers should be treated as maximum ratings rather than guaranteed runtimes.
Our takeaway: Both optics have excellent battery life, but the AEMS-MICRO wins this category with its longer advertised runtime.
AEMS-MICRO vs EPS Carry Automatic Brightness Adjustment
One of the more interesting features of the AEMS-MICRO is its forward-facing light sensor.
The AEMS-MICRO features three operating modes:
- Manual Mode: Allows you to adjust the reticle brightness manually.
- Automatic Mode: Automatically adjusts the reticle brightness based on surrounding lighting conditions using a forward-facing light sensor.
- Lockout Mode: Prevents accidental adjustments by disabling the brightness control buttons.
So why is the forward-facing sensor important?
Traditional solar-based automatic brightness systems typically rely on the amount of light hitting the solar panel on top of the optic.
However, the lighting conditions above your optic aren't always the same as the lighting conditions in the direction you're aiming.
For example, imagine standing in a shaded area while aiming toward a brightly lit target. A top-mounted solar panel might receive relatively little light, even though your target is brightly illuminated.
The AEMS-MICRO's forward-facing sensor helps account for the lighting conditions in front of the optic, allowing it to adjust the reticle brightness more appropriately for the scene you're aiming toward.
The EPS Carry MRS models also feature Solar Failsafe technology, which can supplement battery power and provide solar-based brightness adjustment. However, the EPS Carry does not feature the AEMS-MICRO's dedicated forward-facing light sensor. Standard dot-only EPS Carry models rely on manual brightness control.
Our takeaway: If you like using automatic brightness adjustment, we give the advantage to the AEMS-MICRO. Its forward-facing light sensor is a meaningful upgrade, especially when moving between different lighting environments.
What Features Do the AEMS-MICRO and EPS Carry Have in Common?
Despite their differences, the AEMS-MICRO and EPS Carry actually share quite a few features. Both are premium enclosed pistol optics from Holosun, and both include many of the technologies that have made Holosun so popular.
Enclosed Emitter Design
Both optics feature a fully enclosed emitter, protecting the LED from rain, dust, lint, and other debris.
This is especially useful for concealed carry, where lint and debris can accumulate around an optic throughout everyday use.
Reticle Options and Colors
Both optics are available in red, green, and gold reticle options. Both also offer Holosun's Multi-Reticle System (MRS), which allows shooters to switch between:
- 2 MOA Dot
- 32 MOA Circle
- 2 MOA Dot with 32 MOA Circle
One difference worth mentioning is that every AEMS-MICRO comes standard with MRS, while the EPS Carry is also available in dedicated 2 MOA and 6 MOA dot-only configurations.
Housing Material and Durability
Both optics are constructed from durable 7075-T6 aluminum and feature an IPX8 waterproof rating.
They also share a 5000G vibration resistance rating, making both well suited for slide-mounted pistol applications.
Other Shared Features
- Shake Awake: Helps conserve battery life by deactivating the reticle when the optic is not moving.
- Side-Loading CR1620 Battery: Allows battery replacement without removing the optic.
- Solar Failsafe: Available on both the AEMS-MICRO and EPS Carry MRS models.
- Night Vision Compatibility: Both offer night vision-compatible brightness settings.
- Lockout Mode: Prevents accidental brightness adjustments.
- Enclosed Emitter: Protects the emitter from moisture and debris.
Overall, both optics offer excellent features and durability. The biggest differences really come down to window size, mounting height, battery life, and automatic brightness adjustment.
Who Should Choose the Holosun AEMS-MICRO?
We think the AEMS-MICRO is an excellent option for shooters who want a compact enclosed pistol optic but wish they had a little more viewing space than traditional carry optics provide.
If you currently have a Holosun 407K, 507K, or EPS Carry and find yourself wanting a taller window, the AEMS-MICRO is definitely worth considering.
We'd recommend looking at the AEMS-MICRO if:
- You want a taller viewing window to help track your dot during recoil.
- You value having up to 100,000 hours of rated battery life.
- You prefer automatic brightness adjustment with a forward-facing light sensor.
- You want a Multi-Reticle System with red, green, or gold reticle options.
- You don't mind a taller optic and aren't concerned about co-witnessing factory-height iron sights.
Essentially, the AEMS-MICRO is for someone who prioritizes shooting performance and a taller viewing window over having the smallest possible enclosed optic.
Who Should Choose the Holosun EPS Carry?
The EPS Carry is still one of our favorite enclosed red dots for concealed carry, and for good reason.
It's extremely compact, lightweight, and has one of the lowest deck heights available in an enclosed pistol optic.
We'd recommend the EPS Carry if:
- You want the smallest and lightest optic of these two options.
- You prefer a low-profile optic for everyday concealed carry.
- You want to co-witness with factory-height iron sights on a compatible pistol.
- You want direct mounting on a Holosun K-cut slide.
- You prefer a dedicated 2 MOA or 6 MOA dot configuration.
- You don't need the additional window height of the AEMS-MICRO.
Essentially, the EPS Carry is for someone who wants a compact, lightweight, low-profile enclosed optic without sacrificing the important features you'd expect from Holosun.
Final Thoughts: Holosun AEMS-MICRO vs EPS Carry
So, which optic would we choose?
We think both are excellent enclosed pistol optics, but they're designed for slightly different priorities.
The Holosun AEMS-MICRO is our pick for shooters who want a taller viewing window, longer rated battery life, and a more advanced automatic brightness system. The additional window height is especially appealing for shooters who want more room to track their dot during recoil.
The Holosun EPS Carry remains our pick for shooters who want the most compact and low-profile option of the two. Its extremely low deck height, lighter weight, and ability to co-witness with factory-height iron sights on many pistols make it an outstanding enclosed optic for concealed carry.
Ultimately, neither optic is going to be the perfect choice for everyone. It comes down to whether you value a taller viewing window or a more compact, low-profile setup.
If you're looking for an even larger enclosed optic for a full-size pistol, you may also want to check out the Holosun AEMS-MACRO.
Still unsure which optic is right for your handgun? Reach out to the Freedom Gorilla team and tell us what pistol you have. We'll be happy to help you find the right red dot for your setup!
