I should've known better
I actually use my BUIS, and train with them as a real backup to my optics. These sights are somewhat inconsistent in how they pop up, especially the rear. They don't lock when up, and they don't even have a clearly defined "up" position, in that they can be easily nudged to a more vertical orientation after the buttons are depressed to flip them up. They feel mushy when up. I had a hard time getting them zeroed, and have little confidence in them. They're better than nothing, and actually seem pretty well made, but are terribly designed, hence the 2 star rating, rather than 1 star. I believe it's ultimately just a lousy design, and wish I'd have spent a little more on better sights, or waited until something else was back in stock.
