The Airborne Scope Mount weighs 9.0 oz (255.1 g) and is precision milled using USA made 4142 chrome-moly bar stock with a hardness of 28-32 RC then put it through a rigorous multiple point final inspection process to insure a quality fit and function prior to finishing with a manganese phosphate finish. Each mount comes with all mounting hardware, fasteners, hex wrenches, and detailed instructions.