Seemed like a good idea - HiViz AR-15 Tactical Rifle Front Sight

I have always liked Fiber Optic sights, especially as my eyes age. This sight does offer the great visibility of FO, but the way it's designed affects accuracy. I think it's the way an AR-15 front post works makes this impossible to work correctly. AR-15 post can rotate slightly. This is not a problem with a single, centered, post. But when you have 2 post a slight rotation causes the post to appear to move from side-to-side. So this sight is just not stable in horizontal aim point.