What kind of malfunction results when a fired casing fails to extract, causing another cartridge to attempt entry?

The scenario described involves a situation where a fired casing is not ejected properly from the firearm, leading to the next cartridge attempting to enter the chamber while the spent casing is still present. This type of malfunction is known as a double-feed.

In a double-feed malfunction, one cartridge is already in the chamber, and another cartridge from the magazine tries to enter the chamber, creating a jam. This often occurs when the extractor fails to remove the spent casing from the chamber, which is typically attributed to issues with the firearm’s extraction process.

Understanding this malfunction is crucial for a firearm user, as it emphasizes the importance of ensuring that the extraction and ejection systems are functioning properly. Proper maintenance and handling techniques can help prevent such malfunctions from occurring during operation.