Upgrade your full-size XD handgun with the new XD OSP (Optical Sight Pistol) Slide Assembly and Kit options. These 4in 9mm kits and assemblies provide original XD owners OSP capabilities as well as the ability to convert certain XD models to a full-size 4in 9mm configuration. The slide assemblies, featuring included cover plate, are cut to accept OSP optics mounting plates available for a wide range of popular optics. Specifications for Springfield Armory XD 9mm Optical Sight Pistol Plate Slide Assembly: Manufacturer: Springfield Armory Gun Make: Springfield Armory Gun Model: Springfield Armory XD 4in Cartridge: 9mm Luger Color: Black Fabric/Material: Forged Steel Condition: New Features of Springfield Armory XD 9mm Optical Sight Pistol Plate Slide Assembly Slide assemblies fit 4in and 5in original XD full-size handguns. Not compatible with XD Mod.2, XD-M, XD-M Elite, XD-S, XD-S Mod.2 or XD-E handguns. Package Contents: Springfield Armory XD 9mm Optical Sight Pistol Plate Slide Assembly All kits ship with (1) XD5072 Plate