Was just reading last night on market trends for sighting equipment on firearms..AR stle as well as handgun. In the article it stated a large part of the current sales of similar sights shown in the previous post are being purchased from this company..

http://www.eotechinc.com/

Have read several positive reviews as well on Leupolds version as well...

http://www.leupold.com/hunting-shooting/scopes/deltapoint-reflex-sights/

Ripp