Ade Advanced Optics Deluxe Quick Release Extended Riflescope Mount for Flat-top Platforms (1-Piece), 30mm/1-Inch Perfect for 1-4 riflescopes; Allows for NTCH (nose to charging handle) shooting position; Puts center of scope 1.5-Inch above the rail Extended aluminum riflescope mount ideal for 4/15 flat-top platforms; Inner space between the rings 58mm (2.25inch) Quick- detach feature provides emergency install and release; Fits 30mm and 25mm (1 inch) bodies: includes removable 1" inserts Durable matte black finish; Weight 7.2 ounces; Overall length 6.5-Inch Include a Rail Top Cap with Four-Step Picatinny Rail allows to mount extra capability of adding on additional optics and accessories