A quick mount multi-slot 1/2 inch riser mount to raise line of sight by 1/2" inch Machined from heavy duty extruded aluminum alloy 6061 Locks firmly in place with two easy-to-tighten carbon steel Allen screws 16 ring slots and 2 inch forward extending length for more choices of sight placement which is very helpful for using with full size rifle scopes Anodized in matte black finish Compatible with Picatinny or weaver rings Overall length: 7"(178mm) Weight: 5.2oz.