Follow directions - Nikon A-Series 30mm High Rings Black Matte

I needed to low mount a scope on my Ruger American. I purchased these due to the price and wanting to try vertical split rings. The height was perfect for the 2-7x32AO scope I mounted. Make sure you have a torque driver to set them properly. I failed to do so the first time and they worked their way loose after 30 rounds. After proper torquing and a re-zero, I have had no problems after 100 rounds. 4 stars only because I prefer steel rings, but these are great for a rifle that will not abuse them.