Browning's Integrated Scope Mount System is designed to deliver superior strength, precision, and reliability by unifying the scope ring and base into a single, ultra-rigid unit. Machined from 7000 series aluminum alloy, this system eliminates the common issues associated with separate bases and rings, including misalignment and connection loosening under recoil or extended use. The integrated construction not only simplifies installation but also enhances overall durability and consistency. Medium ring heights measure .540" from the top of the base to the bottom of the scope ring, providing a streamlined profile ideal for precision shooting. Note: This scope mount system is specifically designed for use with BAR and BLR rifles only.