Eotech
How much have you used yours? I have a 516, and had to force myself to learn how to use it. It is fast and accurate out to 300yds(with 5x magnifier).It was hard to do something so simple. It wasn't until I learned to look and slide the mask over the target, that I really understood the beauty of it all. It's just like a computer game. Kinda against everything your used to.