NRA NRA Tools & Equipment for Gunsmithing 2

Question 1

What is a 'reamer' and what is it used for in gunsmithing?

Accepted Answer

A precision rotary cutting tool used to cut or finish a chamber to exact dimensions

Answer

A chamber reamer is a precision cutting tool designed to cut a chamber to exact SAAMI or custom specifications in a barrel blank.

Question 2

What is a 'lathe' primarily used for in a gunsmithing shop?

Accepted Answer

Turning, threading, and facing metal parts to precise dimensions for barrel work, custom parts, and fitting

Answer

A metal lathe is essential for barrel threading, tenon turning, crown cutting, and fitting custom parts to precise tolerances.

Question 3

What is the purpose of a 'Dremel tool' or die grinder in gunsmithing, and what caution applies?

Accepted Answer

Used for light deburring, polishing, and fitting work — caution: removing too much metal can render parts unsafe or non-functional

Answer

Rotary tools are useful for light fitting and polishing but must be used carefully, as excessive material removal can weaken or destroy critical components.

Question 4

What is a 'pin punch set' used for in firearm disassembly and assembly?

Accepted Answer

Driving out drift pins, roll pins, and cross pins that retain components in the action

Answer

Pin punches are used to drive out the various pins that hold firearm components (trigger groups, barrel keys, sights) in place during disassembly.

Question 5

What is an 'ultrasonic cleaner' used for in a gunsmithing shop?

Accepted Answer

Using high-frequency sound waves in a cleaning solution to remove carbon, oil, and debris from small parts without disassembly of each part

Answer

Ultrasonic cleaners use cavitation bubbles created by ultrasound to agitate cleaning solution, loosening and removing fouling from complex parts efficiently.

(NRA) National Rifle Association Certified Gunsmith Practice Test

(NRA) National Rifle Association Certified Gunsmith Practice Test

NRA NRA Tools & Equipment for Gunsmithing 2