Each model in the Backcountry series is engineered using 7075-T6 aluminum, resulting in some of our lightest and most durable mounts to date. These Backcountry ring mounts are designed to attach directly to a Kimber 8400 and are compatible with any riflescope featuring a 30mm main tube. The connection between your scope and firearm is of utmost importance, which is why our mounts are as robust and reliable as the Leupold optics they support. With an extensive range of mounting systems available, you are certain to find the ideal match for your firearm and shooting style. Manufactured in the USA and backed by a lifetime guarantee, Leupold mounts are built to withstand rigorous use and will consistently perform without fail.