CRFSC Operating Firearm Actions 4 — Questions and Answers
Question 1: What is the safest way to open the action of a semi-automatic pistol to verify it is unloaded?
- Remove the magazine, then retract and lock the slide open (Correct answer)
- Pull the trigger while pointing in a safe direction, then remove the magazine
- Remove the magazine and visually inspect without retracting the slide
- Retract the slide without removing the magazine first
Correct answer: Remove the magazine, then retract and lock the slide open
Removing the magazine first prevents new rounds from feeding, then locking the slide back allows a full visual and physical inspection of the chamber.
Question 2: In a break-action double-barreled shotgun, what retains the barrels in the closed position during firing?
- The top lever and underlug locking mechanism (Correct answer)
- Spring tension from the forend only
- The trigger guard pressing against the barrel lug
- Friction between the hinge pin and the receiver
Correct answer: The top lever and underlug locking mechanism
The top lever engages locking bolts against the underlug (or cross-bolt) on the barrel assembly, securely holding the breech closed under firing pressure.
Question 3: What action type uses a rotating cylinder to sequentially present cartridges to a fixed barrel?
- Revolver action (Correct answer)
- Bolt action
- Lever action
- Pump action
Correct answer: Revolver action
The revolver action uses a rotating cylinder where each chamber aligns with the barrel in turn, either manually (single-action) or by trigger pull (double-action).
Question 4: When a semi-automatic firearm is 'in battery,' this means:
- The bolt or slide is fully forward and the firearm is ready to fire (Correct answer)
- The safety is engaged and the hammer is cocked
- The magazine is seated and the chamber is loaded
- The firearm has been cleared and made safe
Correct answer: The bolt or slide is fully forward and the firearm is ready to fire
'In battery' specifically describes the condition where the bolt or slide has returned fully forward, closing the breech so the firearm can fire safely.
Question 5: What is the role of the recoil spring in a blowback-operated semi-automatic pistol?
- It slows and returns the slide forward after each shot (Correct answer)
- It powers the hammer strike on the firing pin
- It holds the magazine in the pistol grip
- It controls trigger reset distance
Correct answer: It slows and returns the slide forward after each shot
In blowback designs, rearward pressure from the fired cartridge pushes the slide back against the recoil spring, which then drives the slide forward to chamber the next round.
Question 6: A single-action revolver must be manually cocked before each shot because:
- The trigger only releases the hammer; it cannot cock it (Correct answer)
- The cylinder does not rotate without cocking
- The firing pin is not attached to the hammer in this design
- Single-action triggers are too light to complete a full cock
Correct answer: The trigger only releases the hammer; it cannot cock it
In a single-action revolver, the trigger performs only one action — releasing the hammer — so the shooter must manually thumb-cock the hammer for each shot.
Question 7: What is 'headspace' in the context of firearm actions?
- The distance between the bolt face and the chamber datum line (Correct answer)
- The gap between the hammer and the firing pin at rest
- The clearance between the cylinder and barrel on a revolver
- The space inside the magazine above the top round
Correct answer: The distance between the bolt face and the chamber datum line
Headspace is the critical measurement from the bolt face to the point in the chamber where a cartridge is stopped, ensuring the case is properly supported during firing.
CRFSC Operating Firearm Actions 4
What is the safest way to open the action of a semi-automatic pistol to verify it is unloaded?