It is a small red dot sight that is closer to an aimpoint as compared to an EOTech. It comes in 4 different models: a 3.5 MOA dot and a 7 MOA dot, in a standard sight or their Military Model. I have both a standard and a military, and as far as I can tell the only difference between the two is that the military model has a saffire covering that protects the emitter from foreign object entry (ie: mud and snow) and a gasket that makes the unit wate resistant to 3 or 4 meters.
The sight works on the "always on" principle...it has a small sensor that detects ambient light levels in the target area and then automatically adjusts the contrast of the sight. There is NO manual brightness adjustment. To turn the sight "off", you have to either put on the little hood that comes with it, or store it in darkness. The battery is said to last 3 years with normal use...whatever that means I don't know. I have had my initial Dr Sight for over 3 years now, used for about 10 minutes every day and the battery is still going strong. I will replace it soon just to stop worrying.
The sight is very similar to the JPoints...except it is far better made (glass and metal construction as compared to plastic and acrylic). The sight is extremely small, and weighs a mere 2 to 3 ounces.
Photograph illustrating the view through the Dr:
Photograph of the Dr Optik Military:
Mini review of the Dr. Sight on a SAGE EBR Chopmod equipped M1A
here (about 2/3 of the way down).
Diminuative footprint of the sight on my M1A:
Do I like it? You betcha, however I've since stripped the sight off the gun and am now an irons only lad...
Good luck,
Brobee