NRA NRA Sight Systems & Optics 3

Question 1

What is the correct procedure for zeroing a rifle scope at 100 yards?

Accepted Answer

Firing test groups and adjusting windage/elevation until the point of impact consistently matches point of aim at 100 yards

Answer

Zeroing requires firing live ammunition at a target and making incremental windage and elevation adjustments until the group center aligns with the intended aiming point at the specified distance.

Question 2

What is the recommended method to verify a scope's reticle is properly leveled during installation?

Accepted Answer

Using a scope leveling kit with dual bubble levels on the action and scope

Answer

A scope leveling kit places a reference level on the receiver and a second level on the scope turret, ensuring the reticle is perfectly vertical and perpendicular to the bore axis to prevent canting errors.

Question 3

What torque range is most commonly recommended for scope ring cap screws to ensure secure retention without damaging the scope tube?

Accepted Answer

15–18 inch-pounds

Answer

Most scope and mount manufacturers specify 15–18 inch-pounds for ring cap screws, providing sufficient clamping force to resist recoil while avoiding crushing or deforming the scope tube.

Question 4

What is the primary aiming advantage of a red dot (reflex) sight compared to traditional iron sights?

Accepted Answer

Faster target acquisition with both eyes open, requiring only a single focal plane

Answer

Red dot sights project an illuminated dot onto the same focal plane as the target, allowing the shooter to aim with both eyes open without aligning multiple sight components, dramatically speeding target acquisition.

Question 5

What is the purpose of lapping scope rings before mounting a scope?

Accepted Answer

Removing material to ensure the ring bores are concentric and provide full, even contact with the scope tube

Answer

Lapping uses an abrasive rod to align and true the ring bore surfaces so they make full, uniform contact with the scope tube, distributing clamping force evenly and preventing stress points that could damage the scope or shift zero.

(NRA) National Rifle Association Certified Gunsmith Practice Test

(NRA) National Rifle Association Certified Gunsmith Practice Test

NRA NRA Sight Systems & Optics 3