Same plane rear sight - XS Sight Systems White Stripe Front Sights for AR Mil-Spec

I bought the Same Plane Rear Sight for my retro AR with a carry handle upper receiver. This sight works great. It is much better than either the A1 or the A2 sights. I really like being able to flip between the large aperture and small aperture, without having my zero changed. I would buy more of these for my flip-up backup sights on my other ARs if they didn't cost so much. But for my primary sight on my retro AR, the cost was definitely worth it. Maybe not so much for just a flip-up backup sight though.