I originaly had one of the first models with the ability to switch for green to red dont. Something i really had no need for. It seemed like a well built unit but didnt have a bright enough dot for bright sunlight outside. I contact strikefire and they said to send it in and they would look at it. Well come to find out i had one of there very early production units and what they did was send me a new one. This model is something new from them. Its red only and the dot is very much brighter then the old. Every bit as bright as my aimpoints. As a matter of fact the dot even looks circular when bright unlike the aimpoints that look like a little blob. This is really a nice uint and i cant seen how they can sell them for a 150 bucks when they compare so closely to an aimpoint at 500.