Holosun makes a deeper pistol-optic lineup than anyone else at the price, and that depth is the problem — once you start comparing model codes the differences stop being obvious. Three families cover most buyers: the 507C, the 508T and the EPS Carry. They share Holosun's hallmark features, and they differ in the two things that actually decide whether an optic suits your pistol: housing design and footprint. All of them live in our Holosun red dots.
What all three share
Before the differences, the common ground — because these three features are most of why people buy Holosun in the first place.
Multi-Reticle System. A button cycles between a plain dot, a circle, and a circle-with-dot. That is not a gimmick. The large circle is fast to find up close, the bare dot is precise at distance, and being able to switch means you can try both on the range rather than committing at the point of purchase.
Solar Failsafe. A small solar panel on top supplements the battery, and in bright light the optic can run on solar alone. The practical benefit is not that you never change the battery — it is that a flat battery in daylight does not leave you with a dark window.
Shake Awake. The optic sleeps when still and wakes on movement. It means you can leave it switched on indefinitely, which is the whole point of a defensive optic.
507C: the open-reflex all-rounder
The 507C is the value benchmark and the one most people should start with. It is an open-reflex optic on the widely supported RMR footprint, which matters enormously: RMR is the most common slide cut and mounting-plate pattern in existence, so a 507C will fit more pistols, with fewer adapter headaches, than almost any alternative.
It is sold in more configurations than the bare model code suggests. We stock it in red, green and gold reticle colours, in both X2 and X3 generations, and in an ACSS reticle version for shooters who want a ranging and holdover reticle rather than a plain dot. There is also a 507COMP variant with a larger window aimed at competition shooters, where a bigger viewing area is worth the extra bulk.
For a full-size or compact optics-ready pistol that is not living in a pocket, the 507C is the easy default and it is hard to argue with.
508T: the same idea in titanium
The 508T is the premium sibling — the same open-reflex, RMR-footprint format, but with a titanium housing instead of aluminium.
Be clear about what that buys you. Titanium is not meaningfully lighter here; it is tougher and more resistant to deformation. If your pistol is a duty gun, a truck gun, or something that gets handled hard and occasionally dropped on concrete, that is worth paying for. If it is a range pistol that lives in a case, you are buying durability you will never cash in.
We stock the 508T in both red and green. It takes the same mounting plates as the 507C, so switching between them later is straightforward.
EPS Carry: an enclosed emitter for carry
The EPS Carry takes a genuinely different path. Instead of an open frame with an exposed LED firing across a gap at the lens, the whole emitter is enclosed — sealed inside the housing behind glass at both ends.
This solves a specific, real problem. An open-emitter optic carried appendix or in a pocket collects lint, dust and rain on the emitter, and when the emitter is obscured the dot dims or disappears. You usually do not notice until you present the pistol. An enclosed emitter cannot be blocked that way, which is why enclosed optics have taken over the carry market. Our guide to enclosed vs open emitter red dots covers the trade in detail.
The catch is the footprint. The EPS Carry uses a smaller carry-pattern footprint rather than the RMR pattern, so it fits slim and compact carry pistols — and it will not drop onto an RMR-cut slide without the right plate. Check your slide cut before ordering, not after.
We stock the EPS Carry in red and green, in both 2 MOA and 6 MOA, and in MRS versions. There is also a full-size EPS for shooters who want the enclosed design on a larger pistol.
Dot size matters more than people expect
You will see the same model offered as a 2 MOA and a 6 MOA, and this choice affects your shooting more than the housing material does.
A 2 MOA dot covers two inches at 100 yards. It is precise, it lets you shoot small targets at distance, and it is the right choice if you shoot competition or want one optic that can do precise work.
A 6 MOA dot is much easier to find fast under stress, particularly for shooters who are new to pistol optics and still learning to present the gun consistently. It covers more of the target at distance, but for defensive distances that is irrelevant.
If the pistol is for carry or home defence, 6 MOA is usually the better answer and plenty of experienced shooters choose it deliberately. If you shoot at distance or compete, take the 2 MOA.
Reticle colour
Holosun offers red, green and gold across much of the range, and this is not cosmetic. Some eyes resolve green noticeably faster in bright daylight, and shooters with astigmatism often find one colour produces a cleaner dot while another smears into a starburst. If you have ever looked through a red dot and seen a comma rather than a circle, trying a different colour is the cheapest fix available. See green dot vs red dot.
How to choose
- 507C — best value, open reflex, RMR footprint, full-size and compact pistols. The default.
- 508T — same format and footprint, titanium housing, for guns that get used hard.
- EPS Carry — enclosed and sealed, carry footprint, for pocket, appendix and everyday carry.
If you cannot decide between the 507C and the EPS Carry, answer one question: does this pistol get carried against your body? If yes, the enclosed emitter is worth the footprint restriction. If it lives in a range bag or a safe, the 507C's wider fitment and lower price win.
Before you order: check the footprint
Footprint is the single most common ordering mistake in pistol optics, and it is entirely avoidable. Find out what your slide is cut for — or what plate your optics-ready pistol shipped with — before you buy. Our guide to pistol red dots and optic footprints walks through the common patterns.
Once it arrives, mount it properly. Torque matters, thread locker matters, and a pistol optic that works loose will lose zero without obviously failing. See how to mount and zero a pistol red dot.
Browse all pistol dot sights, the full Holosun range, or filter by reticle colour in green dot sights and gold dot sights.