The Holosun EPS (Enclosed Pistol Sight) and its compact EPS Carry version are closed-emitter red dot sights designed by the Chinese-American manufacturer Holosun. Launched in 2022, they represent a major breakthrough in the field of pistol optics by combining the total protection of the transmitter with a compact format suitable for both service and discreet pistols.
History and Development of the Holosun EPS
Holosun, founded in 2013, has quickly established itself as a key player in the sighting optics market thanks to its innovative technologies and competitive prices. After the success of open models like the 507C and 507K, the brand identified a growing need for enclosed emitter sights on pistols. Open-emitter sights, while popular, have a vulnerability: dust, rain, snow, or debris can clog the emitting diode and cause the red dot to disappear at the critical moment.
Holosun has developed the EPS range to address this issue. The full-size EPS model has been designed for service and competition pistols, while the EPS Carry has been optimized for compact and subcompact everyday wear pistols. Both models were officially presented at the SHOT Show 2022 and released later that year, immediately meeting with considerable success with civilian shooters and law enforcement.
Technical Specifications
| Feature | EPS (Full Size) | EPS Carry |
|---|---|---|
| Manufacturer | Holosun (California, USA / China) | |
| Type | Closed-back red dot sight | |
| Case Material | : 7075-T6 Aluminum | |
| Reticles available | 2 MOA point, 6 MOA point, MRS (32 MOA circle + 2 MOA point) | |
| Reticle Color: | Red or Green | |
| Dimensions | 1.62 × 1.19 × 0.99 inches | 1.62 × 1.07 × 0.95 inches |
| Viewing Window | 0.63 × 0.91 inches | 0.58 × 0.77 inches |
| Weight | 1.4 oz (39.7 g) | 1.0 oz (28.3 g) |
| Holosun “K” Mounting Footprint (RMSc/Romeo Zero) | Holosun “K” (RMSc/Romeo Zero) | |
| CR1620 Battery (Side Change) | ||
| Battery life | Up to 50,000 hours | |
| IPX8 | Waterproof | |
| Impact resistance | 5,000 G | |
| Brightness levels | 8 daytime levels + night vision modes | |
| Temperature | range-30 °C to +60 °C | |
| 1.5 MOA per click, ±30 MOA windage and elevation | adjustment||
Operation and Technical Particularities
The main innovation of the EPS range lies in its completely enclosed transmitter. Unlike open-emitter viewfinders where the LED diode is exposed, the EPS encloses the entire optical system in a CNC-machined 7075-T6 aluminum housing. This design prevents any external elements — dust, water, mud, powder residue — from disturbing the projection of the red dot on the lens.
Holosun’s unique Multi-Reticle System (MRS) allows the shooter to choose between three reticle configurations: a 2 MOA fine point for accuracy, a 32 MOA circle for fast target acquisition, or a combination of both. Shake Awake technology automatically puts the viewfinder to sleep after a period of inactivity and instantly reactivates it as soon as motion is detected, preserving battery life without compromising operational availability.
The Solar Failsafe system incorporates a miniature solar panel that can power the reticle in sufficient light conditions, providing appreciable energy redundancy. The side drawer for replacing the CR1620 battery allows the battery to be changed without disassembling the sight from the gun, thus preserving the zero setting.
Variants and Versions
The EPS range is available in several versions. The full-size EPS is intended for service and competition pistols such as the Glock 17, Sig P320 or CZ P-10. The more compact and lighter EPS Carry is aimed at subcompact, low-profile pistols such as the Sig P365, Glock 43X MOS or Springfield Hellcat. Each model is available in red (RD) or green (GR) versions, and with different reticle options: 2 MOA single point, 6 MOA point, or MRS system. Holosun has also introduced the EPS Carry MRS, the most versatile variant combining the circle and the point, which is particularly popular for self-defense.
Users and Applications
The EPS range has quickly established itself with a wide range of users. Civilian daily wear shooters (EDC) particularly appreciate the EPS Carry for its reliability and compactness. Competitors in USPSA, IDPA and IPSC use full-size EPS for its rapid target acquisition. Several police departments in the United States have approved the EPS for in-service use, with its enclosed construction providing superior reliability under the most demanding operating conditions. Shooting instructors frequently recommend the EPS range as their first red dot sight for pistols due to its excellent price-performance ratio and proven robustness.
Civil Possession in Switzerland
In Switzerland, the Holosun EPS and EPS Carry sights are freely available for purchase as optical accessories. No licence is required for the acquisition of a red dot sight, as it is considered an accessory and not a weapon within the meaning of the Federal Weapons Act (Firearms Act). Specialist gunsmiths and Swiss online shops offer the entire EPS range. Mounting on a pistol, on the other hand, requires that the shooter be in legal possession of the weapon in question, in accordance with the cantonal provisions in force.
Conclusion
The Holosun EPS and EPS Carry marked a turning point in the pistol sight market by democratizing closed-back transmitter technology at an affordable price. Their combination of robustness, exceptional autonomy and advanced features such as the MRS and the Solar Failsafe make them essential references for anyone wishing to equip their gun with a reliable and efficient red dot.
