![3 moa vs 6 moa reflex sight 3 moa vs 6 moa reflex sight](https://cudaoptics.com/wp-content/uploads/2020/09/blog-what-is-moa.jpg)
A 7 MOA red dot, however, at 15m is 31 mm. Drop back to 15 m and a 3MOA red dot is an apparent 15mm. At 25m a 3MOA is 21mm and at 25m a 7 MOA is 49mm. The correlation between MOA and a Red Dot Sights apparent dot size provides these figures. Relation between MOA and Red Dot Sights apparent dot size The Japanese made Shilba 17 x 24 demonstrates this effect particularly well. When the brightness is dialled back the dot appears smaller and is then more suitable for finer aim. Reticles that have adjustable brightness have a tendency to look larger at high brightness. Reflex Sight Blooming Red Dot reflex sights Blooming effect related to intensity A fat bright dot (or other reticle) allows you to quickly come onto target but are not great for a fine aim. Small dots however are not great for rapid target acquisition. Generally the smaller the dot the easier it is for fine aiming. For simplicity we are going to discuss dot reticles only. As a result Red Dot sights are available with dots, circles, crosshairs, cruciforms, triangles and many other geometric shapes or combinations of them. The fact is that reflex or red dot sights are available with a variety of different reticles. Initially please understand that I use the term “Red Dot” in a broad way. How is this applicable to Red Dot Reflex sights for handguns? The MOA of the sight will determine how big the dot appears on the target. Most of the technical stuff written about MOA – and there’s tons of it – is for long distance precision shooting. Realistically, I am going to stop right there. So at 100m, the arc length of 1 MOA (minute of an angle) is 29mm and because it’s linear, at 1000m, 290mm. What is MOA?Ī degree is divided into 60 even parts called ” minutes of angle.” This minute of angle subtends an arc of different lengths depending on the distance from the origin or center of a circle. So let’s look at the apparent size of the dot on the target and what will be optimum for you. The Truglo RMR (rugged mini red-dot) weighs in at about half that price but it’s still a sizeable investment. A Trijicon or Aimpoint will set you back the price of a new Glock 19 Gen5 MOS.
![3 moa vs 6 moa reflex sight 3 moa vs 6 moa reflex sight](https://nygunforum.com/data/attachments/40/40488-e8810f9fc29e9dfdf6843c2d6d0c2cd7.jpg)
A red dot or reflex gunsight is a major investment. The choice of the correct MOA (minute of angle) for your red dot sight is critical.