"NcStar has done it again! This sight is amazing! Especially for the price! It's very easy to zero in, and once you get it right, it's deadly accurate! If you have a gun with large fixed iron sights (like an M4), you should grab the diamond tactical tri-rail riser with this too. You could also just take the front sight off. Sight is very durable, has great brightness and clarity (you can see it clear in the glare of the sun). is very accurate, and an amazing buy! if you're looking for a good, reliable, relatively inexpensive red dot, this is for you!"