High Quality Low Price This is a high quality, solid riser. The only criticism is that I sent Acme a message asking if I needed the 1/2" or 3/4" inch riser to make one of their red dots co-witness with their flip up sights. I never received a reply so I ordered the 3/4" riser, but as it turns out, I actually needed the the 1/2" riser. So now I am jus going to have to buy another riser.
Great riser Bought this for my primary arms micro dot and it has worked out perfectly