The Trijicon SRS Quick Release Flattop Mount for the Trijicon SRS fits 1913 or STANAG 4694 picatinny rails. It is precision CNC machined from a block of 7075-T6 aluminum and finished in hard coat type 3 mil-spec anodized black for a rock hard lasting finish. Height of Mount Surface to Optical Axis: 1.570". Made in the USA.