The Leupold Mark 4 Bases are crafted from solid steel to provide a secure and reliable mounting solution for specific rifles. Designed with 20 MOA of built-in elevation, this base enhances your rifle’s long-range capabilities by maximizing the adjustment range of your scope. They are machined to precision tolerances, while the Leupold Mark 4 scope bases utilize the proven cross-slot design, ensuring superior integrity and a rock-solid even during heavy recoil. Recognizing the critical connection between your scope and firearm, Leupold engineers it to be the most rugged and durable scope bases available. Manufactured for the most popular rifles, you will find the perfect match for your rifle and shooting style. Made proudly in the USA and backed by Leupold’s Lifetime Guarantee, the Leupold Mark 4 Bases are built to withstand a lifetime of heavy use, ensuring unwavering performance in the most demanding conditions.