Red Dot V2

Slightly bigger and heavier, which adds to the durability of this red dot. The bigger opening allows you to see more through the red dot which helps with aiming. The dot is also very bright even in direct sunlight.

It uses bigger CR2032 batteries instead of CR1632 which is essential for the battery life. Some other red dots use smaller batteries. That is not ideal because you have to change them more often. Not in this case.