This Meprolight USA MPO PRO-F Optic Adapter Plate features a durable matte black aluminum construction designed specifically for standard frame Glock MOS models. Engineered to provide a secure mounting interface between your handgun slide and optic, it includes all required mounting hardware for a precise, low-profile fit. Safety Note Always ensure the firearm is unloaded before installing or adjusting any optics or adapter plates. Verify proper torque specifications during installation. Improper mounting may affect accuracy and safety.