Adapter base fits “iron” rear sight dovetails for easy mounting of a Docter or similar red dot sight with a hole pattern that fits a Docter base. No modifications to slide required. Adjustable hex-head screw ensures a secure lock in the dovetail; includes two hex-head cap screws to secure sight to base. Models available to fit Novak and Bo-Mar rear sight dovetails. Mfg: Egw SPECS: 7075 T6 aluminum, hardcoat anodized, black. Will not accept J-Point/Optima red dot sights.