$174.99. HOLOSUN HS403R Micro Reflex Sight, Black, 2 MOA Red Dot, 10DL & 2NV Brightness Settings, Rotary Switch, Multi-Layer Coating, Waterproof IP67, w/Lower 1/3 Height Mount & Low Base, CR2032, 100,000 hrs 4.3 out of 5 stars 22. It refers to the size of the dot and how much it covers at a certain distance. What You Need To Know About Red Dot Dots: 2-MOA is the standard size given that's what shooters ask for. That should tell you something about what will work for you.

Sig Sauer ROMEO5 1x20mm 2 MOA Red Dot Sight SOR52001 (519) $139.99 New; $122.00 Used; Eotech 512.A65/1 Holographic Red Dot Sight (250) $369.99 New; $349.95 Used; Bushnell Trophy TRS-25 1x25mm Red Dot Sight - Black (702) $107.58 New; $74.99 Used; HOLOSUN Hs510c 2 MOA Open Reflex Circle Dot Solar Power Holographic Red Sight (91) $295.50 New; $280.00 Used; SIG SAUER …
HOLOSUN Elite 2 MOA Dot Night Vision Compatible Solar/Battery Green Dot …

A 2-MOA red-dot works for the guys who put bad guys in the ground. Liberty is the all new open reflex red dot sights intended for every day carry and law enforcement duty use on pistols, carbines, and shotguns. A smaller red dot covers less of the target than a larger one. Holosun HS403B Micro Red Dot Optic (2 MOA),Black 4.3 out of 5 stars 181. However, a larger red dot can be advantageous for moving targets. You, therefore, have to decide what your priorities are and thus make the correct selection of optic for those purposes. 1 MOA is equal to 1.047 inches at 100 yards, which we round down to 1 inch. You’ll pick up bigger dots and get on target at close … Narrower and shorter than their previous Kingslayer series, Liberty is made from tough 7075 aluminum and
A red dot reticle will, therefore, produce something of a spread at given distances, or in other words, the shots will land within a specific area provided the shooter is perfect, and the dot is placed on the exact same area on the target every time. The illuminated red or green dot of a red dot/reflex sight is measured in MOA—minutes of angle, a unit for angular measurement of a circle.

$148.99. Meaning, the circle (red dot) will appear to be 1 inch in diameter on a target 100 yards out.

The dot in red dot optics is measured in MOA, which stands for "minutes of angle" - a unit for angular measurement of a circle. It isn't arbitrary, there's a very good reason why manufacturers make 2 MOA red dots and not smaller.