NRA NRA Tool Usage & Shop Equipment

Question 1

What is the purpose of a barrel vise in gunsmithing?

Accepted Answer

To securely hold the barrel while torquing or removing the action from the barrel

Answer

A barrel vise clamps around the barrel using non-marring inserts to hold it securely while applying torque to install or remove the action or muzzle devices.

Question 2

What is a headspace gauge set used for in gunsmithing?

Accepted Answer

To verify that a chamber's headspace dimension is within safe specifications using GO, NO-GO, and FIELD gauges

Answer

Headspace gauge sets use GO, NO-GO, and FIELD gauges to confirm that the chamber headspace is within SAAMI-specified tolerances for safe operation.

Question 3

What is an action wrench used for?

Accepted Answer

To provide torque on the receiver when removing or installing barrels

Answer

An action wrench fits the receiver and provides a controlled point to apply torque when threading barrels on or off, preventing damage to the action.

Question 4

What is the purpose of a trigger pull gauge?

Accepted Answer

To measure the force required to fire the firearm by pulling the trigger to the break point

Answer

A trigger pull gauge measures the amount of force, typically in ounces or pounds, required to pull the trigger to the point where the firearm fires.

Question 5

What is the primary use of an ultrasonic cleaner in a gunsmith shop?

Accepted Answer

To clean small parts and assemblies using high-frequency vibration in a solvent bath

Answer

Ultrasonic cleaners use high-frequency sound waves to agitate a solvent bath, loosening and removing carbon, grease, and fouling from complex parts and small assemblies.

(NRA) National Rifle Association Certified Gunsmith Practice Test

(NRA) National Rifle Association Certified Gunsmith Practice Test

NRA NRA Tool Usage & Shop Equipment