What is a 'double feed' malfunction?

A 'double feed' malfunction occurs when more than one cartridge attempts to enter the chamber of a firearm at the same time. This typically happens when the magazine feeds two rounds simultaneously. In this situation, only one round can be chambered at a time, causing a blockage that prevents the firearm from firing.

Understanding double feed malfunctions is crucial for firearms handling and maintenance. Proper training involves recognizing the signs of this issue and knowing how to clear it effectively. This malfunction can be particularly dangerous, as it may lead to the need for immediate remedial action to get the firearm operational again.

In contrast, the other options describe different types of malfunctions or issues. For instance, having two shells enter the chamber at once may sound similar, but it lacks the precision of describing the simultaneous feeding from the magazine explicitly. A bullet lodged in the barrel refers to a situation where a round does not exit the firearm after being fired, creating a blockage. The firearm not cycling properly indicates a malfunction but doesn't specifically describe the scenario of multiple rounds trying to feed simultaneously. Understanding these distinctions is key for firearm safety and effective operation.