Holosun has shaken up the optics world by packing premium features into sights at accessible prices — but the range is huge, with model numbers that can baffle newcomers. This buyer's guide decodes the Holosun line-up so you can pick the right optic with confidence.
Understanding Holosun model numbers
Once you know the pattern, the names make sense:
- HS vs HE prefix: HS = standard (usually red); HE = elite, often with a green emitter or upgraded glass. “GR” in the code means green dot.
- 500-series: pistol-size optics (e.g. 507C, 407C, 507K, 407K).
- C vs K: “C” models use the larger RMR-pattern footprint (full-size); “K” models are smaller, on the RMSc footprint for carry.
- EPS / SCS / AEMS / ARO: enclosed and specialist models (see below).
- X2 / X3: the generation of the optic.
Holosun for pistols
For a full-size or duty pistol, the 507C X2 is the do-it-all favourite (solar, Shake Awake, multi-reticle). For carry, the smaller 507K / 407K or the fully sealed EPS Carry suit slim slides. Browse all Holosun pistol red dots, and check your fit with our footprint guide.
Holosun for rifles
For AR-15s and carbines, the HS510C (open reflex, big window), the daylight-bright AEMS, and the compact ARO are standouts. Many pair perfectly with a Holosun HM3X magnifier. See all Holosun rifle red dots.
Enclosed and specialist models
If you want a sealed emitter for all-weather reliability, the EPS (full-size) and EPS Carry, the rugged 509T and the solar-charging SCS (slide-specific) are excellent. Browse enclosed red dot sights.
Red, green or gold?
Most Holosun optics come in red or green, with some gold options. Green can appear brighter in daylight — see our green vs red guide. Browse Holosun green dots.
Key Holosun features explained
- Shake Awake: powers down when still, wakes instantly on movement.
- Solar Failsafe: a solar panel powers the dot in bright light and backs up the battery.
- Multi-Reticle System (MRS): switch between a dot and a circle-dot at the press of a button.
Carrying a spare? Check which cell your model takes in our red dot sight battery chart.
Which Holosun should you buy?
- Full-size pistol: 507C X2.
- Carry pistol: 507K, 407K or EPS Carry (enclosed).
- AR-15: HS510C, AEMS or ARO.
- All-weather: EPS, 509T or SCS.
Explore the whole range in Holosun Optics, or read our best pistol red dots and best AR-15 optics guides.
Frequently asked questions
What's the difference between Holosun 507C and 507K?
The 507C uses the larger RMR footprint for full-size pistols; the 507K is smaller, on the RMSc footprint, for slim carry guns.
What does HS vs HE mean on a Holosun?
HS denotes a standard (typically red) model; HE denotes an elite version, often with a green emitter or upgraded glass.
Are Holosun optics any good?
Yes — they offer features like solar power and Shake Awake usually found on far pricier optics, with a strong reliability record and warranty.