NRA Firearm Repair & Restoration Techniques 3

Question 1

When fitting a new extractor to a semi-automatic pistol, the gunsmith should verify correct tension by:

Accepted Answer

Pressing a loaded cartridge rim under the extractor and confirming snap-in with firm resistance

Answer

Proper extractor tension is confirmed when a cartridge snaps under the extractor with firm resistance and does not rattle or fall out when the pistol is tilted.

Question 2

A double-action revolver's trigger pull is excessively heavy. Which spring is most often replaced or reduced to improve DA pull weight?

Accepted Answer

Mainspring (hammer spring)

Answer

The mainspring (hammer spring) is the primary contributor to double-action trigger pull weight, and replacing it with a reduced-power unit is the standard approach.

Question 3

During a stock inlet repair on a wood-stocked rifle, the gunsmith finds a cracked wrist. The preferred structural repair method is to:

Accepted Answer

Inject thin cyanoacrylate into the crack, clamp, and reinforce with a hidden steel cross-pin if needed

Answer

Thin CA wicks into the grain, bonds the crack, and a cross-pin provides mechanical reinforcement in high-stress wrist areas.

Question 4

What does a 'go' gauge confirm when checking chamber dimensions?

Accepted Answer

The bolt will close on a cartridge at minimum safe headspace

Answer

A go gauge is machined to minimum headspace; if the bolt closes on it, the chamber is at least at minimum safe dimensions and will accept factory ammunition.

Question 5

A shotgun with a loose action body-to-stock joint is being repaired. After tightening the stock bolt, the correct next step is to:

Accepted Answer

Bed the action in the stock using an epoxy bedding compound

Answer

Epoxy bedding fills micro-gaps and creates a perfect, stress-free mating surface between the action and stock, eliminating the play that causes looseness.

(NRA) National Rifle Association Certified Gunsmith Practice Test

(NRA) National Rifle Association Certified Gunsmith Practice Test

NRA Firearm Repair & Restoration Techniques 3