What is categorized as a stoppage in the operation of a rifle?

A stoppage in the operation of a rifle is defined as an unintentional interruption in the cycle of operation. This means that the rifle fails to perform its intended function, such as firing a round, due to various issues like a jam, failure to feed, or a misfire. These interruptions can occur for numerous reasons, including ammunition problems, mechanical failures, or obstructions in the firearm.

Other options do not accurately describe stoppages. A normal function of the rifle indicates that the firearm is operating correctly and without issues, which contrasts sharply with the concept of a stoppage. A planned break in firing suggests deliberate pauses during operation, which are not classified as stoppages. Lastly, an error made by the shooter may lead to a malfunction, but it does not encapsulate the broader scope of what a stoppage entails, as it focuses solely on actions taken by the shooter rather than the operational state of the rifle itself.