Fantastic, i can't believe it is this cheap - UTG Pro 3.8in ITA Red/Green Circle Dot Sight w/Integral QD Mount

This thing is good. I mean really good. It has excellent build quality. The dust caps are really nice. The optical quality is very good and clear. And the red dot in the circle dot is nice and small and sharp. The brightness adjustment range is good. The quick release is nice, but make sure to adjust it to be completely tight. With astigmatism in my eyes, I sometimes see a double circle when aiming at something close, especially if the brightness is turned up high. It affects the circle more than the dot. Seems others say the same. Others have complained about the obstruction caused by the lens retaining rings, but to me it looks similar to other red dot sights and doesn't present a problem if keeping both eyes open.