Precision CNC machined from lightweight, 6061 T6 aluminum with MIL-STD 1913 Picatinny rail pattern allows mounting a variety of sights. Easily accommodates different-length scope bodies and provides generous adjustment for eye relief. Drilled to fit the factory hole spacing and includes mounting screws. Accepts both Picatinny and Weaver-style rings. Hardcoat anodized for durability. Available with 0 MOA base, or 15 MOA base to help maintain your scope’s full elevation adjustment range when shooting at long range.