The slide is the part of a semi-automatic handgun that typically contains the barrel, guide rod, and recoil spring of the firearm. The slide is the portion of a semi-automatic handgun that cycles backward to eject a spent case and then forward to load a new round into the chamber. The slide is also the part of a handgun where sights are installed. It is also a crucial “control surface” for a handgun where shooters will manipulate the slide to help load, unload, and clear malfunctions from the firearm.