Designed for FN FNS and FN FNX models (excluding FN 5.7 and optics-ready pistols); Constructed from 7075 aluminum with a matte black hardcoat; Includes mounting hardware: (2) 6-32 button head screws, (1) 6-32 x 3/16 set screw; Dimensions: 1.604" length, 0.99" width; This mount does not work on any optics ready FN; Your firearm must have a dovetail rear sight to work correctly, not a removable mounting plate