The Battle Steel MRO mounts are precision machined from a single piece of 7075-T6 high strength aluminum. Base Bolt Pattern works with other optics such as Holosun, Bushnell and others. Lifetime Warranty / 100% Satisfaction Guaranteed Specifications: Body: 7075-T6 Aerospace Grade Extruded Aluminum, Type III, Class II Hard Anodized Screw, Nut & Clamp: 12L14 Steel, Black Oxide Light Weight: Only 2.3oz Tru Co-Witness Height Base Pattern will Work With other Optics, Holosun, Bushnell, Etc 100% Made In USA Lifetime Warranty