排莢
The act of ejecting [[shell_casing|shell casings]] from a [[gun|firearm]]. Typically casings are ejected automatically from most modern self-loading [[weapon]]s after a [[ammunition|round]] is fired. 

However, this also applies to the act of manually ejecting casingsーsuch as by cocking the slide of a semi-automatic [[handgun]] or [[pump action]] [[shotgun]], as well as by opening the cylinder of a [[revolver]].
h4. Examples
* !post #7809228
* !post #7731087
* !post #61390: Manual ejection
casing ejection