RSO Firearm Stoppages and Malfunctions Questions and Answers

Question 1

A shooter on the line experiences a noticeably weak report, almost no recoil, and the action on their semi-automatic pistol fails to cycle. Which of the following is the most probable and dangerous malfunction?

Accepted Answer

Squib load

Answer

A squib load is a cartridge with insufficient powder, causing the bullet to lodge in the barrel. The described symptoms—a weak sound ('pop instead of bang'), light or no recoil, and failure to cycle the action—are classic indicators of a squib. This is extremely dangerous because firing another round into the obstructed barrel can cause a catastrophic firearm failure.

Question 2

An RSO observes a shooter's firearm go "click" instead of firing. The RSO's most critical and immediate instruction to the shooter should be based on the potential for what type of event?

Accepted Answer

A hang fire

Answer

A "click" with no discharge could be a misfire or a hang fire (a delayed discharge). Since it's impossible to know the difference immediately, the safest procedure is to treat it as a potential hang fire. The RSO must instruct the shooter to keep the firearm pointed in a safe direction for at least 30 to 60 seconds before attempting to clear the firearm.

Question 3

From a Range Safety Officer's perspective, what is the key difference between a firearm "stoppage" and a "malfunction"?

Accepted Answer

A stoppage is typically clearable by the shooter using immediate action drills, whereas a malfunction often indicates a broken part requiring an armorer.

Answer

A stoppage is an interruption in the cycle of operation that a shooter can typically resolve with immediate action (e.g., tap, rack). A malfunction is a mechanical failure of the firearm itself (e.g., broken extractor, firing pin) that prevents it from working as designed and usually requires diagnosis and repair by a qualified person like an armorer or gunsmith.

Question 4

A shooter's semi-automatic pistol fails to completely close after firing a round, with the slide stopping slightly short of its forward-most position. This condition is known as:

Accepted Answer

Failure to return to battery

Answer

When the slide or bolt of a firearm is not fully in its proper position for firing, it is described as being "out-of-battery" or having a "failure to return to battery." This can be caused by a weak recoil spring, a dirty chamber, or an obstruction. Most modern firearms have a disconnecter that prevents them from firing out of battery, which is a critical safety feature.

Question 5

Which of the following describes a "stovepipe" stoppage?

Accepted Answer

A fired cartridge case getting trapped vertically in the ejection port as the slide closes.

Answer

A stovepipe, also known as a failure to eject, occurs when an empty cartridge case is not fully thrown clear of the firearm and becomes trapped in the ejection port, often resembling a chimney or stovepipe. It is a common type of stoppage that can usually be cleared by the shooter.

(RSO) Certified Range Safety Officer Practice Test

(RSO) Certified Range Safety Officer Practice Test

RSO Firearm Stoppages and Malfunctions Questions and Answers