![3 moa vs 6 moa for astigmatism 3 moa vs 6 moa for astigmatism](https://m.media-amazon.com/images/S/aplus-media/vc/86e823d7-6575-4999-bac7-cbd0c8503419._CR0,0,2560,2560_PT0_SX300__.jpg)
Some are motion censored and others the on/off switch can be mounted on the hand guard (with rifles). Activation: How the reflex red dot sight is turned on or off.This is because some colors are better contrasted in different hunting situations. Multi color options are good for hunting. Also if you want the ability to change the color. Whichever you find most comfortable using.
![3 moa vs 6 moa for astigmatism 3 moa vs 6 moa for astigmatism](https://m.media-amazon.com/images/I/71uCZRu9dsL._AC_SL1500_.jpg)
Think about if you want one with a different shape.
![3 moa vs 6 moa for astigmatism 3 moa vs 6 moa for astigmatism](https://cmore.com/media/RTS2-Dots.png)
Red dots commonly have a single dot as a reticle.
![3 moa vs 6 moa for astigmatism 3 moa vs 6 moa for astigmatism](https://m.media-amazon.com/images/I/71rAGMYgk-L._AC_SL1500_.jpg)
A well built reflex sight will last longer and is a better investment. Consider if you are going to be shooting in extreme heat or cold or in the rain/snow. Same can be said with competition shooting and recreation. If using a red dot for a hunting firearm, you want one that can withstand the elements and any abuse.