Attaching a Rifle Scope to your large caliber rifle is 41% sturdier than before when you use the Leupold Mark 4 Rifle Scope Rings with the innovative 8-40 screws. Perfect for your 50mm objective Rifle Scope, these mounting rings from Leupold offer superior integrity and tighter tolerances, preventing failure from stressed screws. The slot and spline cross slot design ensures that the Leupold Mark 4 Lightweight Rifle Scope Rings stay securely in place despite increased recoil and fit perfectly in any Picatinny rail mounts. Made from strong aircraft-grade aluminum, the Leupold Mark 4 Rifle Scope Rings are durable enough to support your Rifle Scope with each trip to the range or into the field. Specifications for Leupold Mark 4 Rifle Scope Rings: Manufacturer: Leupold Finish: Matte Attachment/Mount Type: Picatinny Ring Quantity: Pair Fabric/Material: Steel Condition: New Color: Black Features of Leupold Mark 4 Rifle Scope Rings: Leupold Mark 4 AR-15/M16 Handle Mount Leupold Mark 4 CQ/T Flat Top Mounting Bracket Mark 4 Base Availability (Mark 4) Mark 4 Bases Accept (Mark 4) Mark 4 CQ/T A.R.M.S. Throw Lever Mount Slot and Spline Design (Mark 4) Package Contents: Leupold Mark 4 Rifle Scope Rings