I was very excited by the reviews and price for this and the Feyachi flip up iron sights. Unfortunately, though they were both easy to install, I've found two issues. First, my red dot sight was not bright. Turning it up to 11 seemed to be the only way to get a real dot with it. It's visible on lower levels, but only if it's very dark in the environment. The second and more important issue: The red dot and iron sights simply do not co-witness. More than that, the red dot sight almost blocks the See full review