Upgrade your G19 Gen3 pistol with the optic-ready Spare Slide from GLOCK. The Slide features MOS technology for easy mounting of red dot optics and front serrations for quicker manipulations. - Package Includes: - GLOCK MOS Slide with assembled internals - GLOCK MOS Cover Plate - GLOCK Standard Sights - Not Included: - Barrel - Recoil Assembly - MOS Adapter Plates (sold separately)