NRA NRA Cleaning & Maintenance

Question 1

What type of solvent is most effective for removing carbon fouling from a firearm bore?

Accepted Answer

Carbon/powder solvent such as Hoppe's No. 9

Answer

Water-based solvent

Answer

Copper solvent

Answer

Penetrating oil like WD-40

Question 2

What is the correct direction to run a cleaning patch through a rifle barrel?

Accepted Answer

From breech to muzzle, to avoid forcing debris into the action

Answer

From muzzle to breech, following the direction of the bullet

Answer

Direction does not matter

Answer

Alternating directions for best results

Question 3

What is the primary risk of over-lubricating a firearm?

Accepted Answer

Attracting dirt and debris, causing malfunctions and potential action sluggishness

Answer

Increased wear on metal surfaces

Answer

Accelerated corrosion of the bore

Answer

Swelling of polymer frame components

Question 4

What is bore erosion and what causes it?

Accepted Answer

Mechanical wear and heat erosion caused by the passage of hot, high-pressure gases and bullets

Answer

Rust from moisture; prevented by keeping the bore dry

Answer

Pitting caused by improper cleaning solvents

Answer

Lead buildup from cast bullets

Question 5

What tool is used to clean the forcing cone area of a revolver barrel?

Accepted Answer

A brass brush sized for the caliber, run from the cylinder gap side

Answer

A bore snake

Answer

A cotton swab with solvent

Answer

A lead-lapping tool

Question 6

How often should a firearm's recoil spring be inspected and potentially replaced?

Accepted Answer

According to the manufacturer's recommended round count or if signs of fatigue are present

Answer

After every shooting session

Answer

Only when the firearm malfunctions

Answer

Every 10 years regardless of use