Originally Posted by frazod
If you watch that shifting graphic in original thread post, you'll notice that all the red dots are mounted at the front of the upper rail over the magazine well. Red dot magnifiers, scopes and iron sights are mounted closer to the rear.
The idea of a red dot is quick target acquisition in combat. You keep both eyes open so that if another threat pops up, you'll see it.
10-4...... It makes sense