casing ejection

The act of ejecting shell casings from a firearm. Typically these are spent casings leaving a semiautomatic or fully automatic weapon, immediately after a round is fired. However, there may also be shotgun casings expelled by manual pump action, or a revolver may have all its empties ejected from the cylinder at once before reloading (see post #61390).

This tag implicates shell_casing (learn more).