STOPPAGE

This term is used when a firearm stops firing due to a malfunction of either the gun mechanism or ammunition. This term is normally used in connection with automatic firearms, machine guns, etc.

STOVE-PIPING

A failure to eject where the fired case is caught in the ejection port by the forward motion of the bolt The case protruding upward out of the ejection port is said to resemble an old fashioned stove pipe.