Red dot vs reflex sight
Quick answer: a reflex sight is a type of red dot, not a competitor to one. "Red dot" is the umbrella term for any non-magnified sight that projects an illuminated aiming point, and the reflex (reflector) design is by far its most common form. The real choice is not red dot vs reflex; it is reflex vs the other red-dot styles, holographic and prism. For most shooters a reflex sight is the right, and cheapest, answer.
The phrase "red dot vs reflex" comes from a common mix-up: people treat them as two things when one contains the other. Clear that up and the useful question falls out, which red-dot design fits your gun and your eye.
Why "red dot vs reflex" is the wrong matchup
A red dot sight is any non-magnified optic that projects a glowing aiming point onto a lens for both eyes to use. That is a category, not a single design. Underneath it sit three ways to make that reticle. A reflex sight uses one LED whose light reflects off a coated lens back to your eye. A holographic sight uses a laser to light up a recorded hologram of the reticle. A prism sight magnifies a glass-etched reticle through a prism. The reflex is so dominant that "red dot" and "reflex" get used interchangeably, but strictly, reflex is one type of red dot.
Reflex, holographic and prism at a glance
| Type | How the reticle is made | Strengths | Trade-offs |
|---|---|---|---|
| Reflex (open) | LED reflected off a coated lens | Lightest, cheapest, huge battery life; most pistol and micro dots | Exposed emitter can collect lint, rain or snow |
| Reflex (enclosed/tube) | Same, sealed behind glass | Weatherproof and rugged for hard duty | Heavier and pricier than an open reflex |
| Holographic | Laser lighting a hologram | Reticle stays usable if the window is partly blocked; fast, flat reticle | Shorter battery life, higher price |
| Prism | Etched reticle magnified by a prism | Works with astigmatism, has some magnification, reticle visible with battery dead | Fixed eye relief, less forgiving than a reflex |
Which should you choose?
- Choose a reflex sight for most uses. It is the lightest, cheapest, longest-running and most versatile red dot, and it covers pistols, carbines and shotguns. See our best red dot sights and best pistol red dot.
- Pick an enclosed (tube) reflex if the gun lives in mud, rain and snow and you want a sealed, duty-grade build over the lightest possible optic.
- Consider a holographic if you want the flat, fast reticle and the tolerance to a partly obscured window; weigh it against a reflex in our red dot vs holographic sight guide, and compare the two icons in EOTech vs Aimpoint.
- Consider a prism if a projected dot smears for you, which is astigmatism; see best red dot for astigmatism.
Bottom line: a reflex sight is not an alternative to a red dot, it is the most common kind of one. The choice that matters is reflex vs holographic vs prism, and for most shooters the reflex wins on weight, price and battery life.
FAQ
Is a reflex sight the same as a red dot?
Essentially yes. "Red dot" is the umbrella term for any non-magnified sight that projects an illuminated aiming point, and a reflex, short for reflector, sight is the most common type of red dot. When a listing says red dot, it almost always means a reflex sight. The distinction only matters when you compare a reflex against the other illuminated-reticle designs: holographic and prism sights.
What is the difference between a reflex and a holographic sight?
A reflex sight uses a single LED whose light bounces off a coated lens back to your eye, which is why it is light, cheap and runs for tens of thousands of hours. A holographic sight, like an EOTech, uses a laser to illuminate a recorded hologram of the reticle, giving a reticle that stays on target even if the window is partly blocked, at the cost of shorter battery life and a higher price. Both are loosely called red dots.
What is an open vs enclosed reflex sight?
An open reflex sight has an exposed lens and emitter, so it is the lightest and cheapest, which is why most pistol dots and micro rifle dots are open. An enclosed or tube reflex sight seals the LED and lens behind glass, like an Aimpoint tube optic, so it shrugs off rain, mud and lint for hard duty use, at more weight and cost. Both are reflex sights.
Is a reflex or prism sight better for astigmatism?
A prism sight is usually better for astigmatism. A reflex or holographic sight projects a lit dot, which an astigmatic eye can smear into a starburst. A prism sight uses a glass-etched reticle magnified by a prism, so the reticle stays crisp even with the illumination off. If a dot always looks like a comma or starburst to you, that is the reason to consider a prism.
Shopping for a dot? See our best red dot sights. Weighing a dot against a holographic? See red dot vs holographic sight. Green or red emitter? See green dot vs red dot sight.