Leupold Ruger No. 1 and .77/22 Ring Mounts were machined from solid steel to ensure maximum ruggedness and dependability in the field. Not only are these rings extremely durable, but they are also lightweight enough that they will never slow you down. Built to deliver top-quality performance and tight tolerance, Leupold Ruger No. 1 and .77/22 Ring Mounts are versatile enough for use with a wide variety of weapons. These ring mounts come in six different models so you can choose the one that is right for you - four 1-inch models and two 30 millimeter models.