I'm researching new sights for concealed carry and steel shoots. (Just bought a Nighthawk Talon III.) I'm interested in the "Big Dot" sight system. In searching the web, I came across someone who recommended the "DR" rear sight over the XS rear sight. The link is 2 years old, and I cannot figure out how to contact the author. Does anyone know what brand "DR" refers to? The author mentioned the fact is was more precise than the XS rear sight, but still provided fast acquistion.