Buying Guides
What MOA Means on a Red Dot Sight (2, 3 & 6 MOA Explained)
MOA explained in plain English: what it means, how 2, 3 and 6 MOA dot sizes differ, and how to choose the right dot size for your rifle or pistol.
If you have shopped for a red dot sight you will have seen dot sizes listed as 2 MOA, 3 MOA or 6 MOA. MOA is one of the most useful specs to understand because it directly affects how fast and how precisely you can aim. Here is what it means in plain English.
What is MOA?
MOA stands for Minute of Angle, an angular measurement. One MOA is roughly one inch at 100 yards (about 2.9 cm at 100 metres). Because it is angular, the dot covers more area the further out you shoot: a 2 MOA dot covers about 2 inches at 100 yards, 4 inches at 200 yards, and so on.
What dot size tells you
The MOA figure on a red dot describes how big the illuminated aiming dot appears on the target. A smaller dot covers less of the target so it is more precise; a larger dot is easier and faster to see, especially up close or in bright light.
- 2 MOA — precise. Ideal for rifles and longer-range shooting where you want to cover as little of the target as possible.
- 3 MOA — a balanced middle ground that works well on both rifles and pistols.
- 6 MOA — fast. Popular on pistols for quick close-range acquisition, though it covers more of a distant target.
Which should you choose?
For a rifle dot sight used at distance, a smaller 2 MOA dot is usually best. For a pistol dot sight used for fast, close shooting, many shooters prefer 6 MOA, while 3 MOA is a great all-rounder. If you want both speed and precision, look at a circle-dot reticle, which combines a large ring for fast acquisition with a small centre dot for accuracy.
Reticle options beyond a simple dot
Many modern optics offer a multi-reticle system, letting you switch between a dot, a circle-dot or a ring. Holographic sights take a different approach with a recorded reticle, which you can read about in our guide to red dot sight vs holographic sight.
Next steps
Once you have settled on a dot size, decide between an open or enclosed emitter in open reflex vs enclosed red dot sights, or browse the full red dot sights range to compare reticles and dot sizes side by side.
