What is the most common semi-auto pistol malfunction?

• A. Double feed
• B. Stove pipe
• C. Failure to eject
• D. Failure to fire

Answer: (D)

The biggest idea here is recognizing what a misfire looks like and why it happens. A failure to fire means the trigger pull does not produce ignition—the round doesn’t discharge even though the gun cycles. This is commonly seen across many semi-auto pistols and ammunition types, often caused by a weak or defective primer, a light hammer/striker strike, or fouling in the firing system. Because no discharge occurs, you need to treat it as a misfire and apply the appropriate drill to determine if a new round can be fired.

The other malfunctions describe feed or ejection issues rather than a lack of ignition. A stove pipe is a case where the spent casing doesn’t eject cleanly and sticks in the ejection port. Double feed means two rounds try to feed into the chamber at once, usually causing a jam. Failure to eject is when the spent casing doesn’t eject at all, preventing the slide from cycling. These problems are common too, but in many field observations misfires—where there’s no bang at all—are reported more frequently, which is why failure to fire is the best answer.