This Mark AR mounting system features an aluminum 1-piece integrated base and rings. It is designed to fit a Picatinny rail and any scope with a 35mm maintube. Leupold's tactical Mark AR family of mounts gets your scope at the right height and the right eye relief while providing one of the most rock-solid mounting solutions in the business. The Mark AR mount features a 5-bolt design for a secure hold, and 3 lugs on the bottom to withstand any kind of recoil. Don't leave your rifle system's accuracy to chance-the cost-efficient Mark AR mount is the answer. Nothing is more crucial than the link between your scope and firearm. That's why our mounts are every bit as rugged and dependable as the Leupold optics they secure. And with a huge variety of mounting systems to pick from, you're sure to find the perfect match for your firearm and style of shooting. Made in the USA and guaranteed to hold up to a lifetime of abuse, Leupold mounts will never let you down.