NRA NRA Tool Usage & Shop Equipment 2

Question 1

What is the function of a chamber reamer?

Accepted Answer

To cut or finish the chamber to the correct dimensions in a new or rebarreled firearm

Answer

A chamber reamer is a precision cutting tool that cuts the chamber to SAAMI-specified dimensions, ensuring correct headspace and a properly formed chamber.

Question 2

When would a gunsmith use a pilot bushing in a drilling operation?

Accepted Answer

To guide the drill bit accurately to prevent walking and ensure perpendicular holes

Answer

A pilot bushing is a hardened guide inserted in a drill jig to precisely locate and guide the drill bit, preventing wandering and ensuring accurate hole placement.

Question 3

What is the purpose of a stoning fixture when working on trigger components?

Accepted Answer

To hold trigger components at a consistent angle while polishing engagement surfaces

Answer

A stoning fixture holds trigger parts (hammer, sear) at the correct angle while an Arkansas or ceramic stone polishes engagement surfaces to improve trigger feel.

Question 4

What is a tap used for in a gunsmithing shop?

Accepted Answer

To cut internal threads in a hole for a screw or threaded component

Answer

A tap is a hardened cutting tool used to cut internal threads inside a drilled hole to accept a machine screw or threaded pin.

Question 5

What is the purpose of using a padded vise jaw or aluminum jaw inserts in gunsmithing?

Accepted Answer

To prevent marring or damaging the surface finish of firearm components

Answer

Padded or aluminum jaw inserts are softer than the steel vise jaws and protect the blued, parkerized, or polished finish of firearm components from scratches and damage.

(NRA) National Rifle Association Certified Gunsmith Practice Test

(NRA) National Rifle Association Certified Gunsmith Practice Test

NRA NRA Tool Usage & Shop Equipment 2