NRA NRA Tools & Equipment for Gunsmithing

Question 1

What is a 'headspace gauge set' and why is it essential in gunsmithing?

Accepted Answer

Go, No-Go, and Field gauges used to verify that chamber headspace is within safe specifications

Answer

Headspace gauges (Go, No-Go, Field) verify the critical chamber dimension to ensure safe and reliable cartridge feeding and firing.

Question 2

What is the purpose of a 'barrel vise' in gunsmithing?

Accepted Answer

To securely hold the barrel during barrel removal, installation, or threading operations without damaging the finish

Answer

A barrel vise grips the barrel shank securely and without marring while the gunsmith applies torque to remove or install a barrel, or while threading.

Question 3

What is an 'action wrench' and when is it used?

Accepted Answer

A tool that grips the receiver and provides leverage for removing or installing barrels

Answer

An action wrench clamps to the receiver and is used in conjunction with a barrel vise to remove or install barrels by applying counter-torque to the action.

Question 4

What is a 'trigger pull gauge' used for in gunsmithing?

Accepted Answer

Measuring the force required to fire a firearm, expressed in ounces or pounds

Answer

A trigger pull gauge measures the firing force in ounces or pounds to verify triggers are within manufacturer spec or customer requirements.

Question 5

What is the correct driver tip type for removing most American firearm screws, and why does it matter?

Accepted Answer

Hollow-ground (gunsmith) flathead bits that fully fill the screw slot to prevent cam-out and screw damage

Answer

Hollow-ground flathead bits are machined to fit screw slots perfectly from base to top, preventing the cam-out that ruins screw heads with standard tapered flathead drivers.

(NRA) National Rifle Association Certified Gunsmith Practice Test

(NRA) National Rifle Association Certified Gunsmith Practice Test

NRA NRA Tools & Equipment for Gunsmithing